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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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<TITLE>simplejson.JSONDecoder -- Simple JSON &lt;<a class="reference" href="http://json.org">http://json.org</a>&gt; decoder</TITLE>
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<H1 ID="doc-title"><A HREF="index.html" REL="index">simplejson 1.9</A></H1>
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<A HREF="index.html" REL="index">index</A>
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<A HREF="module-simplejson.html" TITLE="simplejson reference">
simplejson
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<H1 CLASS="pudge-member-page-heading">
<TT>JSONDecoder</TT>
</H1>
<H4 CLASS="pudge-member-page-subheading">
Simple JSON <<A HREF="http://json.org" CLASS="reference">http://json.org</A>> decoder
</H4>
<P CLASS="pudge-member-parent-link">
<SMALL>
The JSONDecoder class is accessible via the
<A HREF="module-simplejson.html">
<TT>simplejson</TT>
</A> module.
</SMALL>
</P>
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<UL>
<LI>
<SPAN CLASS="pudge-missing-section-link">
Attributes
</SPAN>
</LI><LI>
<A HREF="#methods" CLASS="pudge-section-link">
Methods (3)
</A>
</LI>
<LI>
<A HREF="simplejson/decoder.py.html?f=244&l=340#244" CLASS="pudge-section-link">
Source
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</DIV>
<DIV STYLE="clear: left"></DIV>
<DIV CLASS="rst pudge-module-doc">
<P>Performs the following translations in decoding by default:</P>
<TABLE BORDER="1" CLASS="docutils">
<COLGROUP>
<COL WIDTH="44%">
<COL WIDTH="56%">
</COLGROUP>
<THEAD VALIGN="bottom">
<TR><TH CLASS="head">JSON</TH>
<TH CLASS="head">Python</TH>
</TR>
</THEAD>
<TBODY VALIGN="top">
<TR><TD>object</TD>
<TD>dict</TD>
</TR>
<TR><TD>array</TD>
<TD>list</TD>
</TR>
<TR><TD>string</TD>
<TD>unicode</TD>
</TR>
<TR><TD>number (int)</TD>
<TD>int, long</TD>
</TR>
<TR><TD>number (real)</TD>
<TD>float</TD>
</TR>
<TR><TD>true</TD>
<TD>True</TD>
</TR>
<TR><TD>false</TD>
<TD>False</TD>
</TR>
<TR><TD>null</TD>
<TD>None</TD>
</TR>
</TBODY>
</TABLE>
<P>It also understands <TT CLASS="docutils literal"><SPAN CLASS="pre">NaN</SPAN></TT>, <TT CLASS="docutils literal"><SPAN CLASS="pre">Infinity</SPAN></TT>, and <TT CLASS="docutils literal"><SPAN CLASS="pre">-Infinity</SPAN></TT> as
their corresponding <TT CLASS="docutils literal"><SPAN CLASS="pre">float</SPAN></TT> values, which is outside the JSON spec.</P>
</DIV>
<HR>
<A NAME="methods"></A>
<H2>Methods</H2>
<DIV CLASS="pudge-member routine alias">
<A NAME="__init__"></A>
<H4 CLASS="pudge-member-name"><SPAN CLASS="prefix">f</SPAN>
<TT><A HREF="class-simplejson.JSONDecoder.html#__init__" CLASS="pudge-obj-link">__init__</A>(self, encoding=None, object_hook=None, parse_float=None, parse_int=None, parse_constant=None, strict=True)</TT>
<A HREF="simplejson/decoder.py.html?f=277&l=313#277" TITLE="View Source">...</A>
</H4>
<DIV CLASS="pudge-section rst">
<P CLASS="pudge-member-blurb">
<TT CLASS="docutils literal"><SPAN CLASS="pre">encoding</SPAN></TT> determines the encoding used to interpret any <TT CLASS="docutils literal"><SPAN CLASS="pre">str</SPAN></TT>
objects decoded by this instance (utf-8 by default). It has no
effect when decoding <TT CLASS="docutils literal"><SPAN CLASS="pre">unicode</SPAN></TT> objects.
</P>
<P>Note that currently only encodings that are a superset of ASCII work,
strings of other encodings should be passed in as <TT CLASS="docutils literal"><SPAN CLASS="pre">unicode</SPAN></TT>.</P>
<P><TT CLASS="docutils literal"><SPAN CLASS="pre">object_hook</SPAN></TT>, if specified, will be called with the result
of every JSON object decoded and its return value will be used in
place of the given <TT CLASS="docutils literal"><SPAN CLASS="pre">dict</SPAN></TT>. This can be used to provide custom
deserializations (e.g. to support JSON-RPC class hinting).</P>
<P><TT CLASS="docutils literal"><SPAN CLASS="pre">parse_float</SPAN></TT>, if specified, will be called with the string
of every JSON float to be decoded. By default this is equivalent to
float(num_str). This can be used to use another datatype or parser
for JSON floats (e.g. decimal.Decimal).</P>
<P><TT CLASS="docutils literal"><SPAN CLASS="pre">parse_int</SPAN></TT>, if specified, will be called with the string
of every JSON int to be decoded. By default this is equivalent to
int(num_str). This can be used to use another datatype or parser
for JSON integers (e.g. float).</P>
<P><TT CLASS="docutils literal"><SPAN CLASS="pre">parse_constant</SPAN></TT>, if specified, will be called with one of the
following strings: -Infinity, Infinity, NaN, null, true, false.
This can be used to raise an exception if invalid JSON numbers
are encountered.</P>
</DIV>
</DIV><DIV CLASS="pudge-member routine alias">
<A NAME="decode"></A>
<H4 CLASS="pudge-member-name"><SPAN CLASS="prefix">f</SPAN>
<TT><A HREF="class-simplejson.JSONDecoder.html#decode" CLASS="pudge-obj-link">decode</A>(self, s, _w=<built-in method match of _sre.SRE_Pattern object at 0x15a46e0>)</TT>
<A HREF="simplejson/decoder.py.html?f=314&l=324#314" TITLE="View Source">...</A>
</H4>
<DIV CLASS="pudge-section rst">
<P CLASS="pudge-member-blurb">
Return the Python representation of <TT CLASS="docutils literal"><SPAN CLASS="pre">s</SPAN></TT> (a <TT CLASS="docutils literal"><SPAN CLASS="pre">str</SPAN></TT> or <TT CLASS="docutils literal"><SPAN CLASS="pre">unicode</SPAN></TT>
instance containing a JSON document)
</P>
</DIV>
</DIV><DIV CLASS="pudge-member routine alias">
<A NAME="raw_decode"></A>
<H4 CLASS="pudge-member-name"><SPAN CLASS="prefix">f</SPAN>
<TT><A HREF="class-simplejson.JSONDecoder.html#raw_decode" CLASS="pudge-obj-link">raw_decode</A>(self, s, **kw)</TT>
<A HREF="simplejson/decoder.py.html?f=325&l=340#325" TITLE="View Source">...</A>
</H4>
<DIV CLASS="pudge-section rst">
<P CLASS="pudge-member-blurb">
Decode a JSON document from <TT CLASS="docutils literal"><SPAN CLASS="pre">s</SPAN></TT> (a <TT CLASS="docutils literal"><SPAN CLASS="pre">str</SPAN></TT> or <TT CLASS="docutils literal"><SPAN CLASS="pre">unicode</SPAN></TT> beginning
with a JSON document) and return a 2-tuple of the Python
representation and the index in <TT CLASS="docutils literal"><SPAN CLASS="pre">s</SPAN></TT> where the document ended.
</P>
<P>This can be used to decode a JSON document from a string that may
have extraneous data at the end.</P>
</DIV>
</DIV>
<P>
<SMALL>
See
<A HREF="simplejson/decoder.py.html?f=244&l=340#244" TITLE="simplejson/decoder.py:244">the source</A>
for more information.
</SMALL>
</P>
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