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Document use of %pythoncode "file.py"

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As discussed in github issue #379.
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Olly Betts 2015-06-29 22:24:53 +12:00
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Doc/Manual/Python.html
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@ -3382,6 +3382,18 @@ problems, for example: <tt># error handling</tt>). SWIG 3.0.3 and later report
an error for invalid preprocessor directives, so you may have to update
existing interface files to delimit blocks of Python code correctly.</p>
<p>As an alternative to providing a block containing Python code, you can
include python code from a file. The code is inserted exactly as in the
file, so this avoids any issues with the SWIG preprocessor. It's a good
approach if you have a non-trivial chunk of Python code to insert. To
use this feature you specify a filename in double quotes, for example:</p>
<div class="code">
<pre>
%pythoncode "somecode.py"
</pre>
</div>
<p>Sometimes you may want to replace or modify the wrapper function
that SWIG creates in the proxy <tt>.py</tt> file. The Python module
in SWIG provides some features that enable you to do this. First, to