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from __future__ import absolute_import
import inspect
import warnings
class RemovedInDjango20Warning(DeprecationWarning):
pass
class RemovedInDjango21Warning(PendingDeprecationWarning):
pass
RemovedInNextVersionWarning = RemovedInDjango20Warning
class warn_about_renamed_method(object):
def __init__(self, class_name, old_method_name, new_method_name, deprecation_warning):
self.class_name = class_name
self.old_method_name = old_method_name
self.new_method_name = new_method_name
self.deprecation_warning = deprecation_warning
def __call__(self, f):
def wrapped(*args, **kwargs):
warnings.warn(
"`%s.%s` is deprecated, use `%s` instead." %
(self.class_name, self.old_method_name, self.new_method_name),
self.deprecation_warning, 2)
return f(*args, **kwargs)
return wrapped
class RenameMethodsBase(type):
"""
Handles the deprecation paths when renaming a method.
It does the following:
1) Define the new method if missing and complain about it.
2) Define the old method if missing.
3) Complain whenever an old method is called.
See #15363 for more details.
"""
renamed_methods = ()
def __new__(cls, name, bases, attrs):
new_class = super(RenameMethodsBase, cls).__new__(cls, name, bases, attrs)
for base in inspect.getmro(new_class):
class_name = base.__name__
for renamed_method in cls.renamed_methods:
old_method_name = renamed_method[0]
old_method = base.__dict__.get(old_method_name)
new_method_name = renamed_method[1]
new_method = base.__dict__.get(new_method_name)
deprecation_warning = renamed_method[2]
wrapper = warn_about_renamed_method(class_name, *renamed_method)
# Define the new method if missing and complain about it
if not new_method and old_method:
warnings.warn(
"`%s.%s` method should be renamed `%s`." %
(class_name, old_method_name, new_method_name),
deprecation_warning, 2)
setattr(base, new_method_name, old_method)
setattr(base, old_method_name, wrapper(old_method))
# Define the old method as a wrapped call to the new method.
if not old_method and new_method:
setattr(base, old_method_name, wrapper(new_method))
return new_class
class DeprecationInstanceCheck(type):
def __instancecheck__(self, instance):
warnings.warn(
"`%s` is deprecated, use `%s` instead." % (self.__name__, self.alternative),
self.deprecation_warning, 2
)
return super(DeprecationInstanceCheck, self).__instancecheck__(instance)
class CallableBool:
"""
An boolean-like object that is also callable for backwards compatibility.
"""
do_not_call_in_templates = True
def __init__(self, value):
self.value = value
def __bool__(self):
return self.value
def __call__(self):
warnings.warn(
"Using user.is_authenticated() and user.is_anonymous() as a method "
"is deprecated. Remove the parentheses to use it as an attribute.",
RemovedInDjango20Warning, stacklevel=2
)
return self.value
def __nonzero__(self): # Python 2 compatibility
return self.value
def __repr__(self):
return 'CallableBool(%r)' % self.value
def __eq__(self, other):
return self.value == other
def __ne__(self, other):
return self.value != other
def __or__(self, other):
return bool(self.value or other)
def __hash__(self):
return hash(self.value)
CallableFalse = CallableBool(False)
CallableTrue = CallableBool(True)
class MiddlewareMixin(object):
def __init__(self, get_response=None):
self.get_response = get_response
super(MiddlewareMixin, self).__init__()
def __call__(self, request):
response = None
if hasattr(self, 'process_request'):
response = self.process_request(request)
if not response:
response = self.get_response(request)
if hasattr(self, 'process_response'):
response = self.process_response(request, response)
return response
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