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<title>4.7 cStringIO -- Faster version of StringIO
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<H1><A NAME=
"SECTION006700000000000000000">
4.7 <tt class=
"module">cStringIO
</tt> --
Faster version of
<tt class=
"module">StringIO
</tt></A>
<A NAME=
"module-cStringIO"></A>
The module
<tt class=
"module">cStringIO
</tt> provides an interface similar to that of
the
<tt class=
"module"><a href=
"module-StringIO.html">StringIO
</a></tt> module. Heavy use of
<tt class=
"class">StringIO.StringIO
</tt>
objects can be made more efficient by using the function
<tt class=
"function">StringIO()
</tt> from this module instead.
Since this module provides a factory function which returns objects of
built-in types, there's no way to build your own version using
subclassing. Use the original
<tt class=
"module"><a href=
"module-StringIO.html">StringIO
</a></tt> module in that case.
Unlike the memory files implemented by the
<tt class=
"module"><a href=
"module-StringIO.html">StringIO
</a></tt>
module, those provided by this module are not able to accept Unicode
strings that cannot be encoded as plain ASCII strings.
Another difference from the
<tt class=
"module"><a href=
"module-StringIO.html">StringIO
</a></tt> module is that calling
<tt class=
"function">StringIO()
</tt> with a string parameter creates a read-only object.
Unlike an object created without a string parameter, it does not have
write methods. These objects are not generally visible. They turn up in
tracebacks as
<tt class=
"class">StringI
</tt> and
<tt class=
"class">StringO
</tt>.
The following data objects are provided as well:
<dl><dt><b><tt id='l2h-
958' xml:id='l2h-
958'
>InputType
</tt></b></dt>
The type object of the objects created by calling
<tt class=
"function">StringIO
</tt> with a string parameter.
<dl><dt><b><tt id='l2h-
959' xml:id='l2h-
959'
>OutputType
</tt></b></dt>
The type object of the objects returned by calling
<tt class=
"function">StringIO
</tt> with no parameters.
There is a C API to the module as well; refer to the module source for
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<span class=
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2005.
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