Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859

.. highlightlang:: c

.. _newtypes:

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Object Implementation Support
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This chapter describes the functions, types, and macros used when defining new
object types.

.. toctree::

   allocation.rst
   structures.rst
   typeobj.rst
   gcsupport.rst