ss="link" href="boost_python_ptr_hpp.html#function_invocation_and_creation.boost_python_ptr_hpp.introduction" title="Introduction">Introduction</a>
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<p>
          &lt;boost/python/ptr.hpp&gt; defines the ptr() function template, which
          allows users to specify how to convert C++ pointer values to python in
          the context of implementing overridable virtual functions, invoking Python
          callable objects, or explicitly converting C++ objects to Python. Normally,
  