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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html><head><title>Python: module weakref</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head><body bgcolor="#f0f0f8">
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="heading">
<tr bgcolor="#7799ee">
<td valign=bottom> <br>
<font color="#ffffff" face="helvetica, arial"> <br><big><big><strong>weakref</strong></big></big></font></td
><td align=right valign=bottom
><font color="#ffffff" face="helvetica, arial"><a href=".">index</a><br><a href="file:/usr/lib/python3.10/weakref.py">/usr/lib/python3.10/weakref.py</a></font></td></tr></table>
<p><tt>Weak reference support for Python.<br>
<br>
This module is an implementation of <a href="https://www.python.org/dev/peps/pep-0205/">PEP 205</a>:<br>
<br>
<a href="https://www.python.org/dev/peps/pep-0205/">https://www.python.org/dev/peps/pep-0205/</a></tt></p>
<p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#aa55cc">
<td colspan=3 valign=bottom> <br>
<font color="#fffff" face="helvetica, arial"><big><strong>Modules</strong></big></font></td></tr>
<tr><td bgcolor="#aa55cc"><tt> </tt></td><td> </td>
<td width="100%"><table width="100%" summary="list"><tr><td width="25%" valign=top><a href="collections.abc.html">collections.abc</a><br>
</td><td width="25%" valign=top><a href="itertools.html">itertools</a><br>
</td><td width="25%" valign=top><a href="sys.html">sys</a><br>
</td><td width="25%" valign=top></td></tr></table></td></tr></table><p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ee77aa">
<td colspan=3 valign=bottom> <br>
<font color="#ffffff" face="helvetica, arial"><big><strong>Classes</strong></big></font></td></tr>
<tr><td bgcolor="#ee77aa"><tt> </tt></td><td> </td>
<td width="100%"><dl>
<dt><font face="helvetica, arial"><a href="builtins.html#object">object</a>
</font></dt><dd>
<dl>
<dt><font face="helvetica, arial"><a href="weakref.html#CallableProxyType">CallableProxyType</a>
</font></dt><dt><font face="helvetica, arial"><a href="weakref.html#ProxyType">ProxyType</a>
</font></dt><dt><font face="helvetica, arial"><a href="weakref.html#ReferenceType">ReferenceType</a>
</font></dt><dd>
<dl>
<dt><font face="helvetica, arial"><a href="weakref.html#KeyedRef">KeyedRef</a>
</font></dt><dt><font face="helvetica, arial"><a href="weakref.html#WeakMethod">WeakMethod</a>
</font></dt></dl>
</dd>
<dt><font face="helvetica, arial"><a href="weakref.html#finalize">finalize</a>
</font></dt></dl>
</dd>
<dt><font face="helvetica, arial"><a href="collections.abc.html#MutableMapping">MutableMapping</a>(<a href="collections.abc.html#Mapping">Mapping</a>)
</font></dt><dd>
<dl>
<dt><font face="helvetica, arial"><a href="weakref.html#WeakKeyDictionary">WeakKeyDictionary</a>
</font></dt><dt><font face="helvetica, arial"><a href="weakref.html#WeakValueDictionary">WeakValueDictionary</a>
</font></dt></dl>
</dd>
</dl>
<p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ffc8d8">
<td colspan=3 valign=bottom> <br>
<font color="#000000" face="helvetica, arial"><a name="CallableProxyType">class <strong>CallableProxyType</strong></a>(<a href="builtins.html#object">object</a>)</font></td></tr>
<tr><td bgcolor="#ffc8d8"><tt> </tt></td><td> </td>
<td width="100%">Methods defined here:<br>
<dl><dt><a name="CallableProxyType-__abs__"><strong>__abs__</strong></a>(self, /)</dt><dd><tt>abs(self)</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__add__"><strong>__add__</strong></a>(self, value, /)</dt><dd><tt>Return self+value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__and__"><strong>__and__</strong></a>(self, value, /)</dt><dd><tt>Return self&value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__bool__"><strong>__bool__</strong></a>(self, /)</dt><dd><tt>True if self else False</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__call__"><strong>__call__</strong></a>(self, /, *args, **kwargs)</dt><dd><tt>Call self as a function.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__contains__"><strong>__contains__</strong></a>(self, key, /)</dt><dd><tt>Return key in self.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__delattr__"><strong>__delattr__</strong></a>(self, name, /)</dt><dd><tt>Implement delattr(self, name).</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__delitem__"><strong>__delitem__</strong></a>(self, key, /)</dt><dd><tt>Delete self[key].</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__divmod__"><strong>__divmod__</strong></a>(self, value, /)</dt><dd><tt>Return divmod(self, value).</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__eq__"><strong>__eq__</strong></a>(self, value, /)</dt><dd><tt>Return self==value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__float__"><strong>__float__</strong></a>(self, /)</dt><dd><tt>float(self)</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__floordiv__"><strong>__floordiv__</strong></a>(self, value, /)</dt><dd><tt>Return self//value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__ge__"><strong>__ge__</strong></a>(self, value, /)</dt><dd><tt>Return self>=value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__getattribute__"><strong>__getattribute__</strong></a>(self, name, /)</dt><dd><tt>Return getattr(self, name).</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__getitem__"><strong>__getitem__</strong></a>(self, key, /)</dt><dd><tt>Return self[key].</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__gt__"><strong>__gt__</strong></a>(self, value, /)</dt><dd><tt>Return self>value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__iadd__"><strong>__iadd__</strong></a>(self, value, /)</dt><dd><tt>Return self+=value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__iand__"><strong>__iand__</strong></a>(self, value, /)</dt><dd><tt>Return self&=value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__ifloordiv__"><strong>__ifloordiv__</strong></a>(self, value, /)</dt><dd><tt>Return self//=value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__ilshift__"><strong>__ilshift__</strong></a>(self, value, /)</dt><dd><tt>Return self<<=value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__imatmul__"><strong>__imatmul__</strong></a>(self, value, /)</dt><dd><tt>Return self@=value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__imod__"><strong>__imod__</strong></a>(self, value, /)</dt><dd><tt>Return self%=value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__imul__"><strong>__imul__</strong></a>(self, value, /)</dt><dd><tt>Return self*=value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__index__"><strong>__index__</strong></a>(self, /)</dt><dd><tt>Return self converted to an integer, if self is suitable for use as an index into a list.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__int__"><strong>__int__</strong></a>(self, /)</dt><dd><tt>int(self)</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__invert__"><strong>__invert__</strong></a>(self, /)</dt><dd><tt>~self</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__ior__"><strong>__ior__</strong></a>(self, value, /)</dt><dd><tt>Return self|=value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__ipow__"><strong>__ipow__</strong></a>(self, value, /)</dt><dd><tt>Return self**=value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__irshift__"><strong>__irshift__</strong></a>(self, value, /)</dt><dd><tt>Return self>>=value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__isub__"><strong>__isub__</strong></a>(self, value, /)</dt><dd><tt>Return self-=value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__iter__"><strong>__iter__</strong></a>(self, /)</dt><dd><tt>Implement iter(self).</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__itruediv__"><strong>__itruediv__</strong></a>(self, value, /)</dt><dd><tt>Return self/=value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__ixor__"><strong>__ixor__</strong></a>(self, value, /)</dt><dd><tt>Return self^=value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__le__"><strong>__le__</strong></a>(self, value, /)</dt><dd><tt>Return self<=value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__len__"><strong>__len__</strong></a>(self, /)</dt><dd><tt>Return len(self).</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__lshift__"><strong>__lshift__</strong></a>(self, value, /)</dt><dd><tt>Return self<<value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__lt__"><strong>__lt__</strong></a>(self, value, /)</dt><dd><tt>Return self<value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__matmul__"><strong>__matmul__</strong></a>(self, value, /)</dt><dd><tt>Return self@value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__mod__"><strong>__mod__</strong></a>(self, value, /)</dt><dd><tt>Return self%value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__mul__"><strong>__mul__</strong></a>(self, value, /)</dt><dd><tt>Return self*value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__ne__"><strong>__ne__</strong></a>(self, value, /)</dt><dd><tt>Return self!=value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__neg__"><strong>__neg__</strong></a>(self, /)</dt><dd><tt>-self</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__next__"><strong>__next__</strong></a>(self, /)</dt><dd><tt>Implement next(self).</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__or__"><strong>__or__</strong></a>(self, value, /)</dt><dd><tt>Return self|value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__pos__"><strong>__pos__</strong></a>(self, /)</dt><dd><tt>+self</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__pow__"><strong>__pow__</strong></a>(self, value, mod=None, /)</dt><dd><tt>Return pow(self, value, mod).</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__radd__"><strong>__radd__</strong></a>(self, value, /)</dt><dd><tt>Return value+self.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__rand__"><strong>__rand__</strong></a>(self, value, /)</dt><dd><tt>Return value&self.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__rdivmod__"><strong>__rdivmod__</strong></a>(self, value, /)</dt><dd><tt>Return divmod(value, self).</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__repr__"><strong>__repr__</strong></a>(self, /)</dt><dd><tt>Return repr(self).</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__rfloordiv__"><strong>__rfloordiv__</strong></a>(self, value, /)</dt><dd><tt>Return value//self.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__rlshift__"><strong>__rlshift__</strong></a>(self, value, /)</dt><dd><tt>Return value<<self.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__rmatmul__"><strong>__rmatmul__</strong></a>(self, value, /)</dt><dd><tt>Return value@self.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__rmod__"><strong>__rmod__</strong></a>(self, value, /)</dt><dd><tt>Return value%self.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__rmul__"><strong>__rmul__</strong></a>(self, value, /)</dt><dd><tt>Return value*self.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__ror__"><strong>__ror__</strong></a>(self, value, /)</dt><dd><tt>Return value|self.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__rpow__"><strong>__rpow__</strong></a>(self, value, mod=None, /)</dt><dd><tt>Return pow(value, self, mod).</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__rrshift__"><strong>__rrshift__</strong></a>(self, value, /)</dt><dd><tt>Return value>>self.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__rshift__"><strong>__rshift__</strong></a>(self, value, /)</dt><dd><tt>Return self>>value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__rsub__"><strong>__rsub__</strong></a>(self, value, /)</dt><dd><tt>Return value-self.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__rtruediv__"><strong>__rtruediv__</strong></a>(self, value, /)</dt><dd><tt>Return value/self.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__rxor__"><strong>__rxor__</strong></a>(self, value, /)</dt><dd><tt>Return value^self.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__setattr__"><strong>__setattr__</strong></a>(self, name, value, /)</dt><dd><tt>Implement setattr(self, name, value).</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__setitem__"><strong>__setitem__</strong></a>(self, key, value, /)</dt><dd><tt>Set self[key] to value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__str__"><strong>__str__</strong></a>(self, /)</dt><dd><tt>Return str(self).</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__sub__"><strong>__sub__</strong></a>(self, value, /)</dt><dd><tt>Return self-value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__truediv__"><strong>__truediv__</strong></a>(self, value, /)</dt><dd><tt>Return self/value.</tt></dd></dl>
<dl><dt><a name="CallableProxyType-__xor__"><strong>__xor__</strong></a>(self, value, /)</dt><dd><tt>Return self^value.</tt></dd></dl>
<hr>
Data and other attributes defined here:<br>
<dl><dt><strong>__hash__</strong> = None</dl>
</td></tr></table><p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ffc8d8">
<td colspan=3 valign=bottom> <br>
<font color="#000000" face="helvetica, arial"><a name="KeyedRef">class <strong>KeyedRef</strong></a>(<a href="weakref.html#ReferenceType">ReferenceType</a>)</font></td></tr>
<tr bgcolor="#ffc8d8"><td rowspan=2><tt> </tt></td>
<td colspan=2><tt><a href="#KeyedRef">KeyedRef</a>(ob, callback, key)<br>
<br>
Specialized reference that includes a key corresponding to the value.<br>
<br>
This is used in the <a href="#WeakValueDictionary">WeakValueDictionary</a> to avoid having to create<br>
a function <a href="builtins.html#object">object</a> for each key stored in the mapping. A shared<br>
callback <a href="builtins.html#object">object</a> can use the 'key' attribute of a <a href="#KeyedRef">KeyedRef</a> instead<br>
of getting a reference to the key from an enclosing scope.<br> </tt></td></tr>
<tr><td> </td>
<td width="100%"><dl><dt>Method resolution order:</dt>
<dd><a href="weakref.html#KeyedRef">KeyedRef</a></dd>
<dd><a href="weakref.html#ReferenceType">ReferenceType</a></dd>
<dd><a href="builtins.html#object">object</a></dd>
</dl>
<hr>
Methods defined here:<br>
<dl><dt><a name="KeyedRef-__init__"><strong>__init__</strong></a>(self, ob, callback, key)</dt><dd><tt>Initialize self. See help(type(self)) for accurate signature.</tt></dd></dl>
<hr>
Static methods defined here:<br>
<dl><dt><a name="KeyedRef-__new__"><strong>__new__</strong></a>(type, ob, callback, key)</dt><dd><tt>Create and return a new <a href="builtins.html#object">object</a>. See help(type) for accurate signature.</tt></dd></dl>
<hr>
Data descriptors defined here:<br>
<dl><dt><strong>key</strong></dt>
</dl>
<hr>
Methods inherited from <a href="weakref.html#ReferenceType">ReferenceType</a>:<br>
<dl><dt><a name="KeyedRef-__call__"><strong>__call__</strong></a>(self, /, *args, **kwargs)</dt><dd><tt>Call self as a function.</tt></dd></dl>
<dl><dt><a name="KeyedRef-__eq__"><strong>__eq__</strong></a>(self, value, /)</dt><dd><tt>Return self==value.</tt></dd></dl>
<dl><dt><a name="KeyedRef-__ge__"><strong>__ge__</strong></a>(self, value, /)</dt><dd><tt>Return self>=value.</tt></dd></dl>
<dl><dt><a name="KeyedRef-__gt__"><strong>__gt__</strong></a>(self, value, /)</dt><dd><tt>Return self>value.</tt></dd></dl>
<dl><dt><a name="KeyedRef-__hash__"><strong>__hash__</strong></a>(self, /)</dt><dd><tt>Return hash(self).</tt></dd></dl>
<dl><dt><a name="KeyedRef-__le__"><strong>__le__</strong></a>(self, value, /)</dt><dd><tt>Return self<=value.</tt></dd></dl>
<dl><dt><a name="KeyedRef-__lt__"><strong>__lt__</strong></a>(self, value, /)</dt><dd><tt>Return self<value.</tt></dd></dl>
<dl><dt><a name="KeyedRef-__ne__"><strong>__ne__</strong></a>(self, value, /)</dt><dd><tt>Return self!=value.</tt></dd></dl>
<dl><dt><a name="KeyedRef-__repr__"><strong>__repr__</strong></a>(self, /)</dt><dd><tt>Return repr(self).</tt></dd></dl>
<hr>
Class methods inherited from <a href="weakref.html#ReferenceType">ReferenceType</a>:<br>
<dl><dt><a name="KeyedRef-__class_getitem__"><strong>__class_getitem__</strong></a>(...)<font color="#909090"><font face="helvetica, arial"> from <a href="builtins.html#type">type</a></font></font></dt><dd><tt>See <a href="https://www.python.org/dev/peps/pep-0585/">PEP 585</a></tt></dd></dl>
<hr>
Data descriptors inherited from <a href="weakref.html#ReferenceType">ReferenceType</a>:<br>
<dl><dt><strong>__callback__</strong></dt>
</dl>
</td></tr></table><p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ffc8d8">
<td colspan=3 valign=bottom> <br>
<font color="#000000" face="helvetica, arial"><a name="ProxyType">class <strong>ProxyType</strong></a>(<a href="builtins.html#object">object</a>)</font></td></tr>
<tr><td bgcolor="#ffc8d8"><tt> </tt></td><td> </td>
<td width="100%">Methods defined here:<br>
<dl><dt><a name="ProxyType-__abs__"><strong>__abs__</strong></a>(self, /)</dt><dd><tt>abs(self)</tt></dd></dl>
<dl><dt><a name="ProxyType-__add__"><strong>__add__</strong></a>(self, value, /)</dt><dd><tt>Return self+value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__and__"><strong>__and__</strong></a>(self, value, /)</dt><dd><tt>Return self&value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__bool__"><strong>__bool__</strong></a>(self, /)</dt><dd><tt>True if self else False</tt></dd></dl>
<dl><dt><a name="ProxyType-__bytes__"><strong>__bytes__</strong></a>(...)</dt></dl>
<dl><dt><a name="ProxyType-__contains__"><strong>__contains__</strong></a>(self, key, /)</dt><dd><tt>Return key in self.</tt></dd></dl>
<dl><dt><a name="ProxyType-__delattr__"><strong>__delattr__</strong></a>(self, name, /)</dt><dd><tt>Implement delattr(self, name).</tt></dd></dl>
<dl><dt><a name="ProxyType-__delitem__"><strong>__delitem__</strong></a>(self, key, /)</dt><dd><tt>Delete self[key].</tt></dd></dl>
<dl><dt><a name="ProxyType-__divmod__"><strong>__divmod__</strong></a>(self, value, /)</dt><dd><tt>Return divmod(self, value).</tt></dd></dl>
<dl><dt><a name="ProxyType-__eq__"><strong>__eq__</strong></a>(self, value, /)</dt><dd><tt>Return self==value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__float__"><strong>__float__</strong></a>(self, /)</dt><dd><tt>float(self)</tt></dd></dl>
<dl><dt><a name="ProxyType-__floordiv__"><strong>__floordiv__</strong></a>(self, value, /)</dt><dd><tt>Return self//value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__ge__"><strong>__ge__</strong></a>(self, value, /)</dt><dd><tt>Return self>=value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__getattribute__"><strong>__getattribute__</strong></a>(self, name, /)</dt><dd><tt>Return getattr(self, name).</tt></dd></dl>
<dl><dt><a name="ProxyType-__getitem__"><strong>__getitem__</strong></a>(self, key, /)</dt><dd><tt>Return self[key].</tt></dd></dl>
<dl><dt><a name="ProxyType-__gt__"><strong>__gt__</strong></a>(self, value, /)</dt><dd><tt>Return self>value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__iadd__"><strong>__iadd__</strong></a>(self, value, /)</dt><dd><tt>Return self+=value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__iand__"><strong>__iand__</strong></a>(self, value, /)</dt><dd><tt>Return self&=value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__ifloordiv__"><strong>__ifloordiv__</strong></a>(self, value, /)</dt><dd><tt>Return self//=value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__ilshift__"><strong>__ilshift__</strong></a>(self, value, /)</dt><dd><tt>Return self<<=value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__imatmul__"><strong>__imatmul__</strong></a>(self, value, /)</dt><dd><tt>Return self@=value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__imod__"><strong>__imod__</strong></a>(self, value, /)</dt><dd><tt>Return self%=value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__imul__"><strong>__imul__</strong></a>(self, value, /)</dt><dd><tt>Return self*=value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__index__"><strong>__index__</strong></a>(self, /)</dt><dd><tt>Return self converted to an integer, if self is suitable for use as an index into a list.</tt></dd></dl>
<dl><dt><a name="ProxyType-__int__"><strong>__int__</strong></a>(self, /)</dt><dd><tt>int(self)</tt></dd></dl>
<dl><dt><a name="ProxyType-__invert__"><strong>__invert__</strong></a>(self, /)</dt><dd><tt>~self</tt></dd></dl>
<dl><dt><a name="ProxyType-__ior__"><strong>__ior__</strong></a>(self, value, /)</dt><dd><tt>Return self|=value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__ipow__"><strong>__ipow__</strong></a>(self, value, /)</dt><dd><tt>Return self**=value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__irshift__"><strong>__irshift__</strong></a>(self, value, /)</dt><dd><tt>Return self>>=value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__isub__"><strong>__isub__</strong></a>(self, value, /)</dt><dd><tt>Return self-=value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__iter__"><strong>__iter__</strong></a>(self, /)</dt><dd><tt>Implement iter(self).</tt></dd></dl>
<dl><dt><a name="ProxyType-__itruediv__"><strong>__itruediv__</strong></a>(self, value, /)</dt><dd><tt>Return self/=value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__ixor__"><strong>__ixor__</strong></a>(self, value, /)</dt><dd><tt>Return self^=value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__le__"><strong>__le__</strong></a>(self, value, /)</dt><dd><tt>Return self<=value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__len__"><strong>__len__</strong></a>(self, /)</dt><dd><tt>Return len(self).</tt></dd></dl>
<dl><dt><a name="ProxyType-__lshift__"><strong>__lshift__</strong></a>(self, value, /)</dt><dd><tt>Return self<<value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__lt__"><strong>__lt__</strong></a>(self, value, /)</dt><dd><tt>Return self<value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__matmul__"><strong>__matmul__</strong></a>(self, value, /)</dt><dd><tt>Return self@value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__mod__"><strong>__mod__</strong></a>(self, value, /)</dt><dd><tt>Return self%value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__mul__"><strong>__mul__</strong></a>(self, value, /)</dt><dd><tt>Return self*value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__ne__"><strong>__ne__</strong></a>(self, value, /)</dt><dd><tt>Return self!=value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__neg__"><strong>__neg__</strong></a>(self, /)</dt><dd><tt>-self</tt></dd></dl>
<dl><dt><a name="ProxyType-__next__"><strong>__next__</strong></a>(self, /)</dt><dd><tt>Implement next(self).</tt></dd></dl>
<dl><dt><a name="ProxyType-__or__"><strong>__or__</strong></a>(self, value, /)</dt><dd><tt>Return self|value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__pos__"><strong>__pos__</strong></a>(self, /)</dt><dd><tt>+self</tt></dd></dl>
<dl><dt><a name="ProxyType-__pow__"><strong>__pow__</strong></a>(self, value, mod=None, /)</dt><dd><tt>Return pow(self, value, mod).</tt></dd></dl>
<dl><dt><a name="ProxyType-__radd__"><strong>__radd__</strong></a>(self, value, /)</dt><dd><tt>Return value+self.</tt></dd></dl>
<dl><dt><a name="ProxyType-__rand__"><strong>__rand__</strong></a>(self, value, /)</dt><dd><tt>Return value&self.</tt></dd></dl>
<dl><dt><a name="ProxyType-__rdivmod__"><strong>__rdivmod__</strong></a>(self, value, /)</dt><dd><tt>Return divmod(value, self).</tt></dd></dl>
<dl><dt><a name="ProxyType-__repr__"><strong>__repr__</strong></a>(self, /)</dt><dd><tt>Return repr(self).</tt></dd></dl>
<dl><dt><a name="ProxyType-__reversed__"><strong>__reversed__</strong></a>(...)</dt></dl>
<dl><dt><a name="ProxyType-__rfloordiv__"><strong>__rfloordiv__</strong></a>(self, value, /)</dt><dd><tt>Return value//self.</tt></dd></dl>
<dl><dt><a name="ProxyType-__rlshift__"><strong>__rlshift__</strong></a>(self, value, /)</dt><dd><tt>Return value<<self.</tt></dd></dl>
<dl><dt><a name="ProxyType-__rmatmul__"><strong>__rmatmul__</strong></a>(self, value, /)</dt><dd><tt>Return value@self.</tt></dd></dl>
<dl><dt><a name="ProxyType-__rmod__"><strong>__rmod__</strong></a>(self, value, /)</dt><dd><tt>Return value%self.</tt></dd></dl>
<dl><dt><a name="ProxyType-__rmul__"><strong>__rmul__</strong></a>(self, value, /)</dt><dd><tt>Return value*self.</tt></dd></dl>
<dl><dt><a name="ProxyType-__ror__"><strong>__ror__</strong></a>(self, value, /)</dt><dd><tt>Return value|self.</tt></dd></dl>
<dl><dt><a name="ProxyType-__rpow__"><strong>__rpow__</strong></a>(self, value, mod=None, /)</dt><dd><tt>Return pow(value, self, mod).</tt></dd></dl>
<dl><dt><a name="ProxyType-__rrshift__"><strong>__rrshift__</strong></a>(self, value, /)</dt><dd><tt>Return value>>self.</tt></dd></dl>
<dl><dt><a name="ProxyType-__rshift__"><strong>__rshift__</strong></a>(self, value, /)</dt><dd><tt>Return self>>value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__rsub__"><strong>__rsub__</strong></a>(self, value, /)</dt><dd><tt>Return value-self.</tt></dd></dl>
<dl><dt><a name="ProxyType-__rtruediv__"><strong>__rtruediv__</strong></a>(self, value, /)</dt><dd><tt>Return value/self.</tt></dd></dl>
<dl><dt><a name="ProxyType-__rxor__"><strong>__rxor__</strong></a>(self, value, /)</dt><dd><tt>Return value^self.</tt></dd></dl>
<dl><dt><a name="ProxyType-__setattr__"><strong>__setattr__</strong></a>(self, name, value, /)</dt><dd><tt>Implement setattr(self, name, value).</tt></dd></dl>
<dl><dt><a name="ProxyType-__setitem__"><strong>__setitem__</strong></a>(self, key, value, /)</dt><dd><tt>Set self[key] to value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__str__"><strong>__str__</strong></a>(self, /)</dt><dd><tt>Return str(self).</tt></dd></dl>
<dl><dt><a name="ProxyType-__sub__"><strong>__sub__</strong></a>(self, value, /)</dt><dd><tt>Return self-value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__truediv__"><strong>__truediv__</strong></a>(self, value, /)</dt><dd><tt>Return self/value.</tt></dd></dl>
<dl><dt><a name="ProxyType-__xor__"><strong>__xor__</strong></a>(self, value, /)</dt><dd><tt>Return self^value.</tt></dd></dl>
<hr>
Data and other attributes defined here:<br>
<dl><dt><strong>__hash__</strong> = None</dl>
</td></tr></table><p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ffc8d8">
<td colspan=3 valign=bottom> <br>
<font color="#000000" face="helvetica, arial"><a name="ReferenceType">class <strong>ReferenceType</strong></a>(<a href="builtins.html#object">object</a>)</font></td></tr>
<tr><td bgcolor="#ffc8d8"><tt> </tt></td><td> </td>
<td width="100%">Methods defined here:<br>
<dl><dt><a name="ReferenceType-__call__"><strong>__call__</strong></a>(self, /, *args, **kwargs)</dt><dd><tt>Call self as a function.</tt></dd></dl>
<dl><dt><a name="ReferenceType-__eq__"><strong>__eq__</strong></a>(self, value, /)</dt><dd><tt>Return self==value.</tt></dd></dl>
<dl><dt><a name="ReferenceType-__ge__"><strong>__ge__</strong></a>(self, value, /)</dt><dd><tt>Return self>=value.</tt></dd></dl>
<dl><dt><a name="ReferenceType-__gt__"><strong>__gt__</strong></a>(self, value, /)</dt><dd><tt>Return self>value.</tt></dd></dl>
<dl><dt><a name="ReferenceType-__hash__"><strong>__hash__</strong></a>(self, /)</dt><dd><tt>Return hash(self).</tt></dd></dl>
<dl><dt><a name="ReferenceType-__init__"><strong>__init__</strong></a>(self, /, *args, **kwargs)</dt><dd><tt>Initialize self. See help(type(self)) for accurate signature.</tt></dd></dl>
<dl><dt><a name="ReferenceType-__le__"><strong>__le__</strong></a>(self, value, /)</dt><dd><tt>Return self<=value.</tt></dd></dl>
<dl><dt><a name="ReferenceType-__lt__"><strong>__lt__</strong></a>(self, value, /)</dt><dd><tt>Return self<value.</tt></dd></dl>
<dl><dt><a name="ReferenceType-__ne__"><strong>__ne__</strong></a>(self, value, /)</dt><dd><tt>Return self!=value.</tt></dd></dl>
<dl><dt><a name="ReferenceType-__repr__"><strong>__repr__</strong></a>(self, /)</dt><dd><tt>Return repr(self).</tt></dd></dl>
<hr>
Class methods defined here:<br>
<dl><dt><a name="ReferenceType-__class_getitem__"><strong>__class_getitem__</strong></a>(...)<font color="#909090"><font face="helvetica, arial"> from <a href="builtins.html#type">type</a></font></font></dt><dd><tt>See <a href="https://www.python.org/dev/peps/pep-0585/">PEP 585</a></tt></dd></dl>
<hr>
Static methods defined here:<br>
<dl><dt><a name="ReferenceType-__new__"><strong>__new__</strong></a>(*args, **kwargs)<font color="#909090"><font face="helvetica, arial"> from <a href="builtins.html#type">type</a></font></font></dt><dd><tt>Create and return a new <a href="builtins.html#object">object</a>. See help(type) for accurate signature.</tt></dd></dl>
<hr>
Data descriptors defined here:<br>
<dl><dt><strong>__callback__</strong></dt>
</dl>
</td></tr></table><p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ffc8d8">
<td colspan=3 valign=bottom> <br>
<font color="#000000" face="helvetica, arial"><a name="WeakKeyDictionary">class <strong>WeakKeyDictionary</strong></a>(<a href="collections.abc.html#MutableMapping">MutableMapping</a>)</font></td></tr>
<tr bgcolor="#ffc8d8"><td rowspan=2><tt> </tt></td>
<td colspan=2><tt><a href="#WeakKeyDictionary">WeakKeyDictionary</a>(dict=None)<br>
<br>
Mapping class that references keys weakly.<br>
<br>
Entries in the dictionary will be discarded when there is no<br>
longer a strong reference to the key. This can be used to<br>
associate additional data with an <a href="builtins.html#object">object</a> owned by other parts of<br>
an application without adding attributes to those objects. This<br>
can be especially useful with objects that override attribute<br>
accesses.<br> </tt></td></tr>
<tr><td> </td>
<td width="100%"><dl><dt>Method resolution order:</dt>
<dd><a href="weakref.html#WeakKeyDictionary">WeakKeyDictionary</a></dd>
<dd><a href="collections.abc.html#MutableMapping">MutableMapping</a></dd>
<dd><a href="collections.abc.html#Mapping">Mapping</a></dd>
<dd><a href="collections.abc.html#Collection">Collection</a></dd>
<dd><a href="collections.abc.html#Sized">Sized</a></dd>
<dd><a href="collections.abc.html#Iterable">Iterable</a></dd>
<dd><a href="collections.abc.html#Container">Container</a></dd>
<dd><a href="builtins.html#object">object</a></dd>
</dl>
<hr>
Methods defined here:<br>
<dl><dt><a name="WeakKeyDictionary-__contains__"><strong>__contains__</strong></a>(self, key)</dt></dl>
<dl><dt><a name="WeakKeyDictionary-__copy__"><strong>__copy__</strong></a> = <a href="#WeakKeyDictionary-copy">copy</a>(self)</dt></dl>
<dl><dt><a name="WeakKeyDictionary-__deepcopy__"><strong>__deepcopy__</strong></a>(self, memo)</dt></dl>
<dl><dt><a name="WeakKeyDictionary-__delitem__"><strong>__delitem__</strong></a>(self, key)</dt></dl>
<dl><dt><a name="WeakKeyDictionary-__getitem__"><strong>__getitem__</strong></a>(self, key)</dt></dl>
<dl><dt><a name="WeakKeyDictionary-__init__"><strong>__init__</strong></a>(self, dict=None)</dt><dd><tt>Initialize self. See help(type(self)) for accurate signature.</tt></dd></dl>
<dl><dt><a name="WeakKeyDictionary-__ior__"><strong>__ior__</strong></a>(self, other)</dt></dl>
<dl><dt><a name="WeakKeyDictionary-__iter__"><strong>__iter__</strong></a> = <a href="#WeakKeyDictionary-keys">keys</a>(self)</dt></dl>
<dl><dt><a name="WeakKeyDictionary-__len__"><strong>__len__</strong></a>(self)</dt></dl>
<dl><dt><a name="WeakKeyDictionary-__or__"><strong>__or__</strong></a>(self, other)</dt><dd><tt>Return self|value.</tt></dd></dl>
<dl><dt><a name="WeakKeyDictionary-__repr__"><strong>__repr__</strong></a>(self)</dt><dd><tt>Return repr(self).</tt></dd></dl>
<dl><dt><a name="WeakKeyDictionary-__ror__"><strong>__ror__</strong></a>(self, other)</dt><dd><tt>Return value|self.</tt></dd></dl>
<dl><dt><a name="WeakKeyDictionary-__setitem__"><strong>__setitem__</strong></a>(self, key, value)</dt></dl>
<dl><dt><a name="WeakKeyDictionary-copy"><strong>copy</strong></a>(self)</dt></dl>
<dl><dt><a name="WeakKeyDictionary-get"><strong>get</strong></a>(self, key, default=None)</dt><dd><tt>D.<a href="#WeakKeyDictionary-get">get</a>(k[,d]) -> D[k] if k in D, else d. d defaults to None.</tt></dd></dl>
<dl><dt><a name="WeakKeyDictionary-items"><strong>items</strong></a>(self)</dt><dd><tt>D.<a href="#WeakKeyDictionary-items">items</a>() -> a set-like <a href="builtins.html#object">object</a> providing a view on D's items</tt></dd></dl>
<dl><dt><a name="WeakKeyDictionary-keyrefs"><strong>keyrefs</strong></a>(self)</dt><dd><tt>Return a list of weak references to the keys.<br>
<br>
The references are not guaranteed to be 'live' at the time<br>
they are used, so the result of calling the references needs<br>
to be checked before being used. This can be used to avoid<br>
creating references that will cause the garbage collector to<br>
keep the keys around longer than needed.</tt></dd></dl>
<dl><dt><a name="WeakKeyDictionary-keys"><strong>keys</strong></a>(self)</dt><dd><tt>D.<a href="#WeakKeyDictionary-keys">keys</a>() -> a set-like <a href="builtins.html#object">object</a> providing a view on D's keys</tt></dd></dl>
<dl><dt><a name="WeakKeyDictionary-pop"><strong>pop</strong></a>(self, key, *args)</dt><dd><tt>D.<a href="#WeakKeyDictionary-pop">pop</a>(k[,d]) -> v, remove specified key and return the corresponding value.<br>
If key is not found, d is returned if given, otherwise KeyError is raised.</tt></dd></dl>
<dl><dt><a name="WeakKeyDictionary-popitem"><strong>popitem</strong></a>(self)</dt><dd><tt>D.<a href="#WeakKeyDictionary-popitem">popitem</a>() -> (k, v), remove and return some (key, value) pair<br>
as a 2-tuple; but raise KeyError if D is empty.</tt></dd></dl>
<dl><dt><a name="WeakKeyDictionary-setdefault"><strong>setdefault</strong></a>(self, key, default=None)</dt><dd><tt>D.<a href="#WeakKeyDictionary-setdefault">setdefault</a>(k[,d]) -> D.<a href="#WeakKeyDictionary-get">get</a>(k,d), also set D[k]=d if k not in D</tt></dd></dl>
<dl><dt><a name="WeakKeyDictionary-update"><strong>update</strong></a>(self, dict=None, /, **kwargs)</dt><dd><tt>D.<a href="#WeakKeyDictionary-update">update</a>([E, ]**F) -> None. Update D from mapping/iterable E and F.<br>
If E present and has a .<a href="#WeakKeyDictionary-keys">keys</a>() method, does: for k in E: D[k] = E[k]<br>
If E present and lacks .<a href="#WeakKeyDictionary-keys">keys</a>() method, does: for (k, v) in E: D[k] = v<br>
In either case, this is followed by: for k, v in F.<a href="#WeakKeyDictionary-items">items</a>(): D[k] = v</tt></dd></dl>
<dl><dt><a name="WeakKeyDictionary-values"><strong>values</strong></a>(self)</dt><dd><tt>D.<a href="#WeakKeyDictionary-values">values</a>() -> an <a href="builtins.html#object">object</a> providing a view on D's values</tt></dd></dl>
<hr>
Data descriptors defined here:<br>
<dl><dt><strong>__dict__</strong></dt>
<dd><tt>dictionary for instance variables (if defined)</tt></dd>
</dl>
<dl><dt><strong>__weakref__</strong></dt>
<dd><tt>list of weak references to the object (if defined)</tt></dd>
</dl>
<hr>
Data and other attributes defined here:<br>
<dl><dt><strong>__abstractmethods__</strong> = frozenset()</dl>
<hr>
Methods inherited from <a href="collections.abc.html#MutableMapping">MutableMapping</a>:<br>
<dl><dt><a name="WeakKeyDictionary-clear"><strong>clear</strong></a>(self)</dt><dd><tt>D.<a href="#WeakKeyDictionary-clear">clear</a>() -> None. Remove all items from D.</tt></dd></dl>
<hr>
Methods inherited from <a href="collections.abc.html#Mapping">Mapping</a>:<br>
<dl><dt><a name="WeakKeyDictionary-__eq__"><strong>__eq__</strong></a>(self, other)</dt><dd><tt>Return self==value.</tt></dd></dl>
<hr>
Data and other attributes inherited from <a href="collections.abc.html#Mapping">Mapping</a>:<br>
<dl><dt><strong>__hash__</strong> = None</dl>
<dl><dt><strong>__reversed__</strong> = None</dl>
<hr>
Class methods inherited from <a href="collections.abc.html#Collection">Collection</a>:<br>
<dl><dt><a name="WeakKeyDictionary-__subclasshook__"><strong>__subclasshook__</strong></a>(C)<font color="#909090"><font face="helvetica, arial"> from <a href="abc.html#ABCMeta">ABCMeta</a></font></font></dt><dd><tt>Abstract classes can override this to customize issubclass().<br>
<br>
This is invoked early on by abc.ABCMeta.__subclasscheck__().<br>
It should return True, False or NotImplemented. If it returns<br>
NotImplemented, the normal algorithm is used. Otherwise, it<br>
overrides the normal algorithm (and the outcome is cached).</tt></dd></dl>
<hr>
Class methods inherited from <a href="collections.abc.html#Iterable">Iterable</a>:<br>
<dl><dt><a name="WeakKeyDictionary-__class_getitem__"><strong>__class_getitem__</strong></a> = GenericAlias(...)<font color="#909090"><font face="helvetica, arial"> from <a href="abc.html#ABCMeta">ABCMeta</a></font></font></dt><dd><tt>Represent a <a href="https://www.python.org/dev/peps/pep-0585/">PEP 585</a> generic type<br>
<br>
E.g. for t = list[int], t.__origin__ is list and t.__args__ is (int,).</tt></dd></dl>
</td></tr></table><p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ffc8d8">
<td colspan=3 valign=bottom> <br>
<font color="#000000" face="helvetica, arial"><a name="WeakMethod">class <strong>WeakMethod</strong></a>(<a href="weakref.html#ReferenceType">ReferenceType</a>)</font></td></tr>
<tr bgcolor="#ffc8d8"><td rowspan=2><tt> </tt></td>
<td colspan=2><tt><a href="#WeakMethod">WeakMethod</a>(meth, callback=None)<br>
<br>
A custom `weakref.<a href="#ref">ref</a>` subclass which simulates a weak reference to<br>
a bound method, working around the lifetime problem of bound methods.<br> </tt></td></tr>
<tr><td> </td>
<td width="100%"><dl><dt>Method resolution order:</dt>
<dd><a href="weakref.html#WeakMethod">WeakMethod</a></dd>
<dd><a href="weakref.html#ReferenceType">ReferenceType</a></dd>
<dd><a href="builtins.html#object">object</a></dd>
</dl>
<hr>
Methods defined here:<br>
<dl><dt><a name="WeakMethod-__call__"><strong>__call__</strong></a>(self)</dt><dd><tt>Call self as a function.</tt></dd></dl>
<dl><dt><a name="WeakMethod-__eq__"><strong>__eq__</strong></a>(self, other)</dt><dd><tt>Return self==value.</tt></dd></dl>
<dl><dt><a name="WeakMethod-__hash__"><strong>__hash__</strong></a>(self, /)</dt><dd><tt>Return hash(self).</tt></dd></dl>
<dl><dt><a name="WeakMethod-__ne__"><strong>__ne__</strong></a>(self, other)</dt><dd><tt>Return self!=value.</tt></dd></dl>
<hr>
Static methods defined here:<br>
<dl><dt><a name="WeakMethod-__new__"><strong>__new__</strong></a>(cls, meth, callback=None)</dt><dd><tt>Create and return a new <a href="builtins.html#object">object</a>. See help(type) for accurate signature.</tt></dd></dl>
<hr>
Data descriptors defined here:<br>
<dl><dt><strong>__weakref__</strong></dt>
<dd><tt>list of weak references to the object (if defined)</tt></dd>
</dl>
<hr>
Methods inherited from <a href="weakref.html#ReferenceType">ReferenceType</a>:<br>
<dl><dt><a name="WeakMethod-__ge__"><strong>__ge__</strong></a>(self, value, /)</dt><dd><tt>Return self>=value.</tt></dd></dl>
<dl><dt><a name="WeakMethod-__gt__"><strong>__gt__</strong></a>(self, value, /)</dt><dd><tt>Return self>value.</tt></dd></dl>
<dl><dt><a name="WeakMethod-__init__"><strong>__init__</strong></a>(self, /, *args, **kwargs)</dt><dd><tt>Initialize self. See help(type(self)) for accurate signature.</tt></dd></dl>
<dl><dt><a name="WeakMethod-__le__"><strong>__le__</strong></a>(self, value, /)</dt><dd><tt>Return self<=value.</tt></dd></dl>
<dl><dt><a name="WeakMethod-__lt__"><strong>__lt__</strong></a>(self, value, /)</dt><dd><tt>Return self<value.</tt></dd></dl>
<dl><dt><a name="WeakMethod-__repr__"><strong>__repr__</strong></a>(self, /)</dt><dd><tt>Return repr(self).</tt></dd></dl>
<hr>
Class methods inherited from <a href="weakref.html#ReferenceType">ReferenceType</a>:<br>
<dl><dt><a name="WeakMethod-__class_getitem__"><strong>__class_getitem__</strong></a>(...)<font color="#909090"><font face="helvetica, arial"> from <a href="builtins.html#type">type</a></font></font></dt><dd><tt>See <a href="https://www.python.org/dev/peps/pep-0585/">PEP 585</a></tt></dd></dl>
<hr>
Data descriptors inherited from <a href="weakref.html#ReferenceType">ReferenceType</a>:<br>
<dl><dt><strong>__callback__</strong></dt>
</dl>
</td></tr></table><p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ffc8d8">
<td colspan=3 valign=bottom> <br>
<font color="#000000" face="helvetica, arial"><a name="WeakValueDictionary">class <strong>WeakValueDictionary</strong></a>(<a href="collections.abc.html#MutableMapping">MutableMapping</a>)</font></td></tr>
<tr bgcolor="#ffc8d8"><td rowspan=2><tt> </tt></td>
<td colspan=2><tt><a href="#WeakValueDictionary">WeakValueDictionary</a>(other=(), /, **kw)<br>
<br>
Mapping class that references values weakly.<br>
<br>
Entries in the dictionary will be discarded when no strong<br>
reference to the value exists anymore<br> </tt></td></tr>
<tr><td> </td>
<td width="100%"><dl><dt>Method resolution order:</dt>
<dd><a href="weakref.html#WeakValueDictionary">WeakValueDictionary</a></dd>
<dd><a href="collections.abc.html#MutableMapping">MutableMapping</a></dd>
<dd><a href="collections.abc.html#Mapping">Mapping</a></dd>
<dd><a href="collections.abc.html#Collection">Collection</a></dd>
<dd><a href="collections.abc.html#Sized">Sized</a></dd>
<dd><a href="collections.abc.html#Iterable">Iterable</a></dd>
<dd><a href="collections.abc.html#Container">Container</a></dd>
<dd><a href="builtins.html#object">object</a></dd>
</dl>
<hr>
Methods defined here:<br>
<dl><dt><a name="WeakValueDictionary-__contains__"><strong>__contains__</strong></a>(self, key)</dt></dl>
<dl><dt><a name="WeakValueDictionary-__copy__"><strong>__copy__</strong></a> = <a href="#WeakValueDictionary-copy">copy</a>(self)</dt></dl>
<dl><dt><a name="WeakValueDictionary-__deepcopy__"><strong>__deepcopy__</strong></a>(self, memo)</dt></dl>
<dl><dt><a name="WeakValueDictionary-__delitem__"><strong>__delitem__</strong></a>(self, key)</dt></dl>
<dl><dt><a name="WeakValueDictionary-__getitem__"><strong>__getitem__</strong></a>(self, key)</dt></dl>
<dl><dt><a name="WeakValueDictionary-__init__"><strong>__init__</strong></a>(self, other=(), /, **kw)</dt><dd><tt>Initialize self. See help(type(self)) for accurate signature.</tt></dd></dl>
<dl><dt><a name="WeakValueDictionary-__ior__"><strong>__ior__</strong></a>(self, other)</dt></dl>
<dl><dt><a name="WeakValueDictionary-__iter__"><strong>__iter__</strong></a> = <a href="#WeakValueDictionary-keys">keys</a>(self)</dt></dl>
<dl><dt><a name="WeakValueDictionary-__len__"><strong>__len__</strong></a>(self)</dt></dl>
<dl><dt><a name="WeakValueDictionary-__or__"><strong>__or__</strong></a>(self, other)</dt><dd><tt>Return self|value.</tt></dd></dl>
<dl><dt><a name="WeakValueDictionary-__repr__"><strong>__repr__</strong></a>(self)</dt><dd><tt>Return repr(self).</tt></dd></dl>
<dl><dt><a name="WeakValueDictionary-__ror__"><strong>__ror__</strong></a>(self, other)</dt><dd><tt>Return value|self.</tt></dd></dl>
<dl><dt><a name="WeakValueDictionary-__setitem__"><strong>__setitem__</strong></a>(self, key, value)</dt></dl>
<dl><dt><a name="WeakValueDictionary-copy"><strong>copy</strong></a>(self)</dt></dl>
<dl><dt><a name="WeakValueDictionary-get"><strong>get</strong></a>(self, key, default=None)</dt><dd><tt>D.<a href="#WeakValueDictionary-get">get</a>(k[,d]) -> D[k] if k in D, else d. d defaults to None.</tt></dd></dl>
<dl><dt><a name="WeakValueDictionary-items"><strong>items</strong></a>(self)</dt><dd><tt>D.<a href="#WeakValueDictionary-items">items</a>() -> a set-like <a href="builtins.html#object">object</a> providing a view on D's items</tt></dd></dl>
<dl><dt><a name="WeakValueDictionary-itervaluerefs"><strong>itervaluerefs</strong></a>(self)</dt><dd><tt>Return an iterator that yields the weak references to the values.<br>
<br>
The references are not guaranteed to be 'live' at the time<br>
they are used, so the result of calling the references needs<br>
to be checked before being used. This can be used to avoid<br>
creating references that will cause the garbage collector to<br>
keep the values around longer than needed.</tt></dd></dl>
<dl><dt><a name="WeakValueDictionary-keys"><strong>keys</strong></a>(self)</dt><dd><tt>D.<a href="#WeakValueDictionary-keys">keys</a>() -> a set-like <a href="builtins.html#object">object</a> providing a view on D's keys</tt></dd></dl>
<dl><dt><a name="WeakValueDictionary-pop"><strong>pop</strong></a>(self, key, *args)</dt><dd><tt>D.<a href="#WeakValueDictionary-pop">pop</a>(k[,d]) -> v, remove specified key and return the corresponding value.<br>
If key is not found, d is returned if given, otherwise KeyError is raised.</tt></dd></dl>
<dl><dt><a name="WeakValueDictionary-popitem"><strong>popitem</strong></a>(self)</dt><dd><tt>D.<a href="#WeakValueDictionary-popitem">popitem</a>() -> (k, v), remove and return some (key, value) pair<br>
as a 2-tuple; but raise KeyError if D is empty.</tt></dd></dl>
<dl><dt><a name="WeakValueDictionary-setdefault"><strong>setdefault</strong></a>(self, key, default=None)</dt><dd><tt>D.<a href="#WeakValueDictionary-setdefault">setdefault</a>(k[,d]) -> D.<a href="#WeakValueDictionary-get">get</a>(k,d), also set D[k]=d if k not in D</tt></dd></dl>
<dl><dt><a name="WeakValueDictionary-update"><strong>update</strong></a>(self, other=None, /, **kwargs)</dt><dd><tt>D.<a href="#WeakValueDictionary-update">update</a>([E, ]**F) -> None. Update D from mapping/iterable E and F.<br>
If E present and has a .<a href="#WeakValueDictionary-keys">keys</a>() method, does: for k in E: D[k] = E[k]<br>
If E present and lacks .<a href="#WeakValueDictionary-keys">keys</a>() method, does: for (k, v) in E: D[k] = v<br>
In either case, this is followed by: for k, v in F.<a href="#WeakValueDictionary-items">items</a>(): D[k] = v</tt></dd></dl>
<dl><dt><a name="WeakValueDictionary-valuerefs"><strong>valuerefs</strong></a>(self)</dt><dd><tt>Return a list of weak references to the values.<br>
<br>
The references are not guaranteed to be 'live' at the time<br>
they are used, so the result of calling the references needs<br>
to be checked before being used. This can be used to avoid<br>
creating references that will cause the garbage collector to<br>
keep the values around longer than needed.</tt></dd></dl>
<dl><dt><a name="WeakValueDictionary-values"><strong>values</strong></a>(self)</dt><dd><tt>D.<a href="#WeakValueDictionary-values">values</a>() -> an <a href="builtins.html#object">object</a> providing a view on D's values</tt></dd></dl>
<hr>
Data descriptors defined here:<br>
<dl><dt><strong>__dict__</strong></dt>
<dd><tt>dictionary for instance variables (if defined)</tt></dd>
</dl>
<dl><dt><strong>__weakref__</strong></dt>
<dd><tt>list of weak references to the object (if defined)</tt></dd>
</dl>
<hr>
Data and other attributes defined here:<br>
<dl><dt><strong>__abstractmethods__</strong> = frozenset()</dl>
<hr>
Methods inherited from <a href="collections.abc.html#MutableMapping">MutableMapping</a>:<br>
<dl><dt><a name="WeakValueDictionary-clear"><strong>clear</strong></a>(self)</dt><dd><tt>D.<a href="#WeakValueDictionary-clear">clear</a>() -> None. Remove all items from D.</tt></dd></dl>
<hr>
Methods inherited from <a href="collections.abc.html#Mapping">Mapping</a>:<br>
<dl><dt><a name="WeakValueDictionary-__eq__"><strong>__eq__</strong></a>(self, other)</dt><dd><tt>Return self==value.</tt></dd></dl>
<hr>
Data and other attributes inherited from <a href="collections.abc.html#Mapping">Mapping</a>:<br>
<dl><dt><strong>__hash__</strong> = None</dl>
<dl><dt><strong>__reversed__</strong> = None</dl>
<hr>
Class methods inherited from <a href="collections.abc.html#Collection">Collection</a>:<br>
<dl><dt><a name="WeakValueDictionary-__subclasshook__"><strong>__subclasshook__</strong></a>(C)<font color="#909090"><font face="helvetica, arial"> from <a href="abc.html#ABCMeta">ABCMeta</a></font></font></dt><dd><tt>Abstract classes can override this to customize issubclass().<br>
<br>
This is invoked early on by abc.ABCMeta.__subclasscheck__().<br>
It should return True, False or NotImplemented. If it returns<br>
NotImplemented, the normal algorithm is used. Otherwise, it<br>
overrides the normal algorithm (and the outcome is cached).</tt></dd></dl>
<hr>
Class methods inherited from <a href="collections.abc.html#Iterable">Iterable</a>:<br>
<dl><dt><a name="WeakValueDictionary-__class_getitem__"><strong>__class_getitem__</strong></a> = GenericAlias(...)<font color="#909090"><font face="helvetica, arial"> from <a href="abc.html#ABCMeta">ABCMeta</a></font></font></dt><dd><tt>Represent a <a href="https://www.python.org/dev/peps/pep-0585/">PEP 585</a> generic type<br>
<br>
E.g. for t = list[int], t.__origin__ is list and t.__args__ is (int,).</tt></dd></dl>
</td></tr></table><p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ffc8d8">
<td colspan=3 valign=bottom> <br>
<font color="#000000" face="helvetica, arial"><a name="finalize">class <strong>finalize</strong></a>(<a href="builtins.html#object">object</a>)</font></td></tr>
<tr bgcolor="#ffc8d8"><td rowspan=2><tt> </tt></td>
<td colspan=2><tt><a href="#finalize">finalize</a>(obj, func, /, *args, **kwargs)<br>
<br>
Class for finalization of weakrefable objects<br>
<br>
<a href="#finalize">finalize</a>(obj, func, *args, **kwargs) returns a callable finalizer<br>
<a href="builtins.html#object">object</a> which will be called when obj is garbage collected. The<br>
first time the finalizer is called it evaluates func(*arg, **kwargs)<br>
and returns the result. After this the finalizer is dead, and<br>
calling it just returns None.<br>
<br>
When the program exits any remaining finalizers for which the<br>
atexit attribute is true will be run in reverse order of creation.<br>
By default atexit is true.<br> </tt></td></tr>
<tr><td> </td>
<td width="100%">Methods defined here:<br>
<dl><dt><a name="finalize-__call__"><strong>__call__</strong></a>(self, _=None)</dt><dd><tt>If alive then mark as dead and return func(*args, **kwargs);<br>
otherwise return None</tt></dd></dl>
<dl><dt><a name="finalize-__init__"><strong>__init__</strong></a>(self, obj, func, /, *args, **kwargs)</dt><dd><tt>Initialize self. See help(type(self)) for accurate signature.</tt></dd></dl>
<dl><dt><a name="finalize-__repr__"><strong>__repr__</strong></a>(self)</dt><dd><tt>Return repr(self).</tt></dd></dl>
<dl><dt><a name="finalize-detach"><strong>detach</strong></a>(self)</dt><dd><tt>If alive then mark as dead and return (obj, func, args, kwargs);<br>
otherwise return None</tt></dd></dl>
<dl><dt><a name="finalize-peek"><strong>peek</strong></a>(self)</dt><dd><tt>If alive then return (obj, func, args, kwargs);<br>
otherwise return None</tt></dd></dl>
<hr>
Readonly properties defined here:<br>
<dl><dt><strong>alive</strong></dt>
<dd><tt>Whether finalizer is alive</tt></dd>
</dl>
<hr>
Data descriptors defined here:<br>
<dl><dt><strong>atexit</strong></dt>
<dd><tt>Whether finalizer should be called at exit</tt></dd>
</dl>
</td></tr></table><p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#ffc8d8">
<td colspan=3 valign=bottom> <br>
<font color="#000000" face="helvetica, arial"><strong>ref</strong> = <a name="ref">class ReferenceType</a>(<a href="builtins.html#object">object</a>)</font></td></tr>
<tr><td bgcolor="#ffc8d8"><tt> </tt></td><td> </td>
<td width="100%">Methods defined here:<br>
<dl><dt><a name="ReferenceType-__call__"><strong>__call__</strong></a>(self, /, *args, **kwargs)</dt><dd><tt>Call self as a function.</tt></dd></dl>
<dl><dt><a name="ReferenceType-__eq__"><strong>__eq__</strong></a>(self, value, /)</dt><dd><tt>Return self==value.</tt></dd></dl>
<dl><dt><a name="ReferenceType-__ge__"><strong>__ge__</strong></a>(self, value, /)</dt><dd><tt>Return self>=value.</tt></dd></dl>
<dl><dt><a name="ReferenceType-__gt__"><strong>__gt__</strong></a>(self, value, /)</dt><dd><tt>Return self>value.</tt></dd></dl>
<dl><dt><a name="ReferenceType-__hash__"><strong>__hash__</strong></a>(self, /)</dt><dd><tt>Return hash(self).</tt></dd></dl>
<dl><dt><a name="ReferenceType-__init__"><strong>__init__</strong></a>(self, /, *args, **kwargs)</dt><dd><tt>Initialize self. See help(type(self)) for accurate signature.</tt></dd></dl>
<dl><dt><a name="ReferenceType-__le__"><strong>__le__</strong></a>(self, value, /)</dt><dd><tt>Return self<=value.</tt></dd></dl>
<dl><dt><a name="ReferenceType-__lt__"><strong>__lt__</strong></a>(self, value, /)</dt><dd><tt>Return self<value.</tt></dd></dl>
<dl><dt><a name="ReferenceType-__ne__"><strong>__ne__</strong></a>(self, value, /)</dt><dd><tt>Return self!=value.</tt></dd></dl>
<dl><dt><a name="ReferenceType-__repr__"><strong>__repr__</strong></a>(self, /)</dt><dd><tt>Return repr(self).</tt></dd></dl>
<hr>
Class methods defined here:<br>
<dl><dt><a name="ReferenceType-__class_getitem__"><strong>__class_getitem__</strong></a>(...)<font color="#909090"><font face="helvetica, arial"> from <a href="builtins.html#type">type</a></font></font></dt><dd><tt>See <a href="https://www.python.org/dev/peps/pep-0585/">PEP 585</a></tt></dd></dl>
<hr>
Static methods defined here:<br>
<dl><dt><a name="ReferenceType-__new__"><strong>__new__</strong></a>(*args, **kwargs)<font color="#909090"><font face="helvetica, arial"> from <a href="builtins.html#type">type</a></font></font></dt><dd><tt>Create and return a new <a href="builtins.html#object">object</a>. See help(type) for accurate signature.</tt></dd></dl>
<hr>
Data descriptors defined here:<br>
<dl><dt><strong>__callback__</strong></dt>
</dl>
</td></tr></table></td></tr></table><p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#eeaa77">
<td colspan=3 valign=bottom> <br>
<font color="#ffffff" face="helvetica, arial"><big><strong>Functions</strong></big></font></td></tr>
<tr><td bgcolor="#eeaa77"><tt> </tt></td><td> </td>
<td width="100%"><dl><dt><a name="-_remove_dead_weakref"><strong>_remove_dead_weakref</strong></a>(dct, key, /)</dt><dd><tt>Atomically remove key from dict if it points to a dead weakref.</tt></dd></dl>
<dl><dt><a name="-getweakrefcount"><strong>getweakrefcount</strong></a>(object, /)</dt><dd><tt>Return the number of weak references to '<a href="builtins.html#object">object</a>'.</tt></dd></dl>
<dl><dt><a name="-getweakrefs"><strong>getweakrefs</strong></a>(...)</dt><dd><tt><a href="#-getweakrefs">getweakrefs</a>(<a href="builtins.html#object">object</a>) -- return a list of all weak reference objects<br>
that point to '<a href="builtins.html#object">object</a>'.</tt></dd></dl>
<dl><dt><a name="-proxy"><strong>proxy</strong></a>(...)</dt><dd><tt><a href="#-proxy">proxy</a>(<a href="builtins.html#object">object</a>[, callback]) -- create a proxy <a href="builtins.html#object">object</a> that weakly<br>
references '<a href="builtins.html#object">object</a>'. 'callback', if given, is called with a<br>
reference to the proxy when '<a href="builtins.html#object">object</a>' is about to be finalized.</tt></dd></dl>
</td></tr></table><p>
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section">
<tr bgcolor="#55aa55">
<td colspan=3 valign=bottom> <br>
<font color="#ffffff" face="helvetica, arial"><big><strong>Data</strong></big></font></td></tr>
<tr><td bgcolor="#55aa55"><tt> </tt></td><td> </td>
<td width="100%"><strong>ProxyTypes</strong> = (<class 'weakref.ProxyType'>, <class 'weakref.CallableProxyType'>)<br>
<strong>__all__</strong> = ['ref', 'proxy', 'getweakrefcount', 'getweakrefs', 'WeakKeyDictionary', 'ReferenceType', 'ProxyType', 'CallableProxyType', 'ProxyTypes', 'WeakValueDictionary', 'WeakSet', 'WeakMethod', 'finalize']<br>
<strong>__cached__</strong> = '/usr/lib/python3.10/__pycache__/weakref.cpython-310.pyc'<br>
<strong>__file__</strong> = '/usr/lib/python3.10/weakref.py'<br>
<strong>__loader__</strong> = <_frozen_importlib_external.SourceFileLoader object><br>
<strong>__name__</strong> = 'weakref'<br>
<strong>__spec__</strong> = ModuleSpec(name='weakref', loader=<_frozen_impor...a55a80>, origin='/usr/lib/python3.10/weakref.py')</td></tr></table>
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