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Title: Memory Management — Python 3.12.12 documentation

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Description: Overview: Memory management in Python involves a private heap containing all Python objects and data structures. The management of this private heap is ensured internally by the Python memory manag...

Open Graph Description: Overview: Memory management in Python involves a private heap containing all Python objects and data structures. The management of this private heap is ensured internally by the Python memory manag...

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Links:

	https://www.python.org/
Table of Contents	https://docs.python.org/3.12/contents.html
Memory Management	https://docs.python.org/3.12/c-api/memory.html
Overview	https://docs.python.org/3.12/c-api/memory.html#overview
Allocator Domains	https://docs.python.org/3.12/c-api/memory.html#allocator-domains
Raw Memory Interface	https://docs.python.org/3.12/c-api/memory.html#raw-memory-interface
Memory Interface	https://docs.python.org/3.12/c-api/memory.html#memory-interface
Object allocators	https://docs.python.org/3.12/c-api/memory.html#object-allocators
Default Memory Allocators	https://docs.python.org/3.12/c-api/memory.html#default-memory-allocators
Customize Memory Allocators	https://docs.python.org/3.12/c-api/memory.html#customize-memory-allocators
Debug hooks on the Python memory allocators	https://docs.python.org/3.12/c-api/memory.html#debug-hooks-on-the-python-memory-allocators
The pymalloc allocator	https://docs.python.org/3.12/c-api/memory.html#the-pymalloc-allocator
Customize pymalloc Arena Allocator	https://docs.python.org/3.12/c-api/memory.html#customize-pymalloc-arena-allocator
tracemalloc C API	https://docs.python.org/3.12/c-api/memory.html#tracemalloc-c-api
Examples	https://docs.python.org/3.12/c-api/memory.html#examples
Python Initialization Configuration	https://docs.python.org/3.12/c-api/init_config.html
Object Implementation Support	https://docs.python.org/3.12/c-api/objimpl.html
Report a Bug	https://docs.python.org/3.12/bugs.html
Show Source	https://github.com/python/cpython/blob/main/Doc/c-api/memory.rst
index	https://docs.python.org/3.12/genindex.html
modules	https://docs.python.org/3.12/py-modindex.html
next	https://docs.python.org/3.12/c-api/objimpl.html
previous	https://docs.python.org/3.12/c-api/init_config.html
Python	https://www.python.org/
3.12.12 Documentation	https://docs.python.org/3.12/index.html
Python/C API Reference Manual	https://docs.python.org/3.12/c-api/index.html
Memory Management	https://docs.python.org/3.12/c-api/memory.html
¶	https://docs.python.org/3.12/c-api/memory.html#memory-management
¶	https://docs.python.org/3.12/c-api/memory.html#overview
PYTHONMALLOC	https://docs.python.org/3.12/using/cmdline.html#envvar-PYTHONMALLOC
PYTHONMALLOCSTATS	https://docs.python.org/3.12/using/cmdline.html#envvar-PYTHONMALLOCSTATS
pymalloc memory allocator	https://docs.python.org/3.12/c-api/memory.html#pymalloc
¶	https://docs.python.org/3.12/c-api/memory.html#allocator-domains
PyMemAllocatorDomain	https://docs.python.org/3.12/c-api/memory.html#c.PyMemAllocatorDomain
here	https://docs.python.org/3.12/c-api/memory.html#default-memory-allocators
PyMem_RawMalloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawMalloc
PyObject_Malloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Malloc
GIL	https://docs.python.org/3.12/glossary.html#term-GIL
GIL	https://docs.python.org/3.12/glossary.html#term-GIL
PyMem_Free()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Free
PyMem_Malloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Malloc
¶	https://docs.python.org/3.12/c-api/memory.html#raw-memory-interface
GIL	https://docs.python.org/3.12/glossary.html#term-global-interpreter-lock
default raw memory allocator	https://docs.python.org/3.12/c-api/memory.html#default-memory-allocators
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawMalloc
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawCalloc
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawRealloc
PyMem_RawMalloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawMalloc
PyMem_RawRealloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawRealloc
PyMem_RawCalloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawCalloc
PyMem_RawRealloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawRealloc
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawFree
PyMem_RawMalloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawMalloc
PyMem_RawRealloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawRealloc
PyMem_RawCalloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawCalloc
¶	https://docs.python.org/3.12/c-api/memory.html#memory-interface
default memory allocator	https://docs.python.org/3.12/c-api/memory.html#default-memory-allocators
pymalloc memory allocator	https://docs.python.org/3.12/c-api/memory.html#pymalloc
GIL	https://docs.python.org/3.12/glossary.html#term-global-interpreter-lock
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Malloc
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Calloc
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Realloc
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
PyMem_Malloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Malloc
PyMem_Realloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Realloc
PyMem_Calloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Calloc
PyMem_Realloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Realloc
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Free
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
PyMem_Malloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Malloc
PyMem_Realloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Realloc
PyMem_Calloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Calloc
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_New
PyMem_Malloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Malloc
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Resize
PyMem_Realloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Realloc
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Del
PyMem_Free()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Free
¶	https://docs.python.org/3.12/c-api/memory.html#object-allocators
Customize Memory Allocators	https://docs.python.org/3.12/c-api/memory.html#customize-memory-allocators
default object allocator	https://docs.python.org/3.12/c-api/memory.html#default-memory-allocators
pymalloc memory allocator	https://docs.python.org/3.12/c-api/memory.html#pymalloc
GIL	https://docs.python.org/3.12/glossary.html#term-global-interpreter-lock
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Malloc
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Calloc
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Realloc
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
PyObject_Malloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Malloc
PyObject_Realloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Realloc
PyObject_Calloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Calloc
PyObject_Realloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Realloc
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Free
Stable ABI	https://docs.python.org/3.12/c-api/stable.html#stable
PyObject_Malloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Malloc
PyObject_Realloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Realloc
PyObject_Calloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Calloc
¶	https://docs.python.org/3.12/c-api/memory.html#default-memory-allocators
PYTHONMALLOC	https://docs.python.org/3.12/using/cmdline.html#envvar-PYTHONMALLOC
pymalloc memory allocator	https://docs.python.org/3.12/c-api/memory.html#pymalloc
debug hooks on the Python memory allocators	https://docs.python.org/3.12/c-api/memory.html#pymem-debug-hooks
Python build in debug mode	https://docs.python.org/3.12/using/configure.html#debug-build
¶	https://docs.python.org/3.12/c-api/memory.html#customize-memory-allocators
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyMemAllocatorEx
PyMemAllocatorEx	https://docs.python.org/3.12/c-api/memory.html#c.PyMemAllocatorEx
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyMemAllocatorDomain
¶	https://docs.python.org/3.12/c-api/memory.html#c.PYMEM_DOMAIN_RAW
PyMem_RawMalloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawMalloc
PyMem_RawRealloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawRealloc
PyMem_RawCalloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawCalloc
PyMem_RawFree()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawFree
¶	https://docs.python.org/3.12/c-api/memory.html#c.PYMEM_DOMAIN_MEM
PyMem_Malloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Malloc
PyMem_Realloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Realloc
PyMem_Calloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Calloc
PyMem_Free()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Free
¶	https://docs.python.org/3.12/c-api/memory.html#c.PYMEM_DOMAIN_OBJ
PyObject_Malloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Malloc
PyObject_Realloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Realloc
PyObject_Calloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Calloc
PyObject_Free()	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Free
PyMemAllocatorDomain	https://docs.python.org/3.12/c-api/memory.html#c.PyMemAllocatorDomain
PyMemAllocatorEx	https://docs.python.org/3.12/c-api/memory.html#c.PyMemAllocatorEx
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_GetAllocator
PyMemAllocatorDomain	https://docs.python.org/3.12/c-api/memory.html#c.PyMemAllocatorDomain
PyMemAllocatorEx	https://docs.python.org/3.12/c-api/memory.html#c.PyMemAllocatorEx
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_SetAllocator
PYMEM_DOMAIN_RAW	https://docs.python.org/3.12/c-api/memory.html#c.PYMEM_DOMAIN_RAW
GIL	https://docs.python.org/3.12/glossary.html#term-global-interpreter-lock
PyMem_SetupDebugHooks()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_SetupDebugHooks
PyPreConfig.allocator	https://docs.python.org/3.12/c-api/init_config.html#c.PyPreConfig.allocator
Preinitialize Python with PyPreConfig	https://docs.python.org/3.12/c-api/init_config.html#c-preinit
PyMem_SetAllocator()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_SetAllocator
Py_PreInitialize()	https://docs.python.org/3.12/c-api/init_config.html#c.Py_PreInitialize
Py_InitializeFromConfig()	https://docs.python.org/3.12/c-api/init_config.html#c.Py_InitializeFromConfig
the section on allocator domains	https://docs.python.org/3.12/c-api/memory.html#id1
Py_InitializeFromConfig()	https://docs.python.org/3.12/c-api/init_config.html#c.Py_InitializeFromConfig
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_SetupDebugHooks
debug hooks in the Python memory allocators	https://docs.python.org/3.12/c-api/memory.html#pymem-debug-hooks
¶	https://docs.python.org/3.12/c-api/memory.html#debug-hooks-on-the-python-memory-allocators
Python is built in debug mode	https://docs.python.org/3.12/using/configure.html#debug-build
PyMem_SetupDebugHooks()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_SetupDebugHooks
Python preinitialization	https://docs.python.org/3.12/c-api/init_config.html#c-preinit
PYTHONMALLOC	https://docs.python.org/3.12/using/cmdline.html#envvar-PYTHONMALLOC
PyMem_SetupDebugHooks()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_SetupDebugHooks
PyMem_SetAllocator()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_SetAllocator
PyObject_Free()	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Free
PyMem_Malloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Malloc
GIL	https://docs.python.org/3.12/glossary.html#term-global-interpreter-lock
PYMEM_DOMAIN_OBJ	https://docs.python.org/3.12/c-api/memory.html#c.PYMEM_DOMAIN_OBJ
PyObject_Malloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Malloc
PYMEM_DOMAIN_MEM	https://docs.python.org/3.12/c-api/memory.html#c.PYMEM_DOMAIN_MEM
PyMem_Malloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Malloc
tracemalloc	https://docs.python.org/3.12/library/tracemalloc.html#module-tracemalloc
tracemalloc	https://docs.python.org/3.12/library/tracemalloc.html#module-tracemalloc
PYMEM_DOMAIN_RAW	https://docs.python.org/3.12/c-api/memory.html#c.PYMEM_DOMAIN_RAW
PYMEM_DOMAIN_MEM	https://docs.python.org/3.12/c-api/memory.html#c.PYMEM_DOMAIN_MEM
PYMEM_DOMAIN_OBJ	https://docs.python.org/3.12/c-api/memory.html#c.PYMEM_DOMAIN_OBJ
PyMem_SetupDebugHooks()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_SetupDebugHooks
tracemalloc	https://docs.python.org/3.12/library/tracemalloc.html#module-tracemalloc
PYMEM_DOMAIN_OBJ	https://docs.python.org/3.12/c-api/memory.html#c.PYMEM_DOMAIN_OBJ
PYMEM_DOMAIN_MEM	https://docs.python.org/3.12/c-api/memory.html#c.PYMEM_DOMAIN_MEM
¶	https://docs.python.org/3.12/c-api/memory.html#the-pymalloc-allocator
PyMem_RawMalloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawMalloc
PyMem_RawRealloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_RawRealloc
default allocator	https://docs.python.org/3.12/c-api/memory.html#default-memory-allocators
PYMEM_DOMAIN_MEM	https://docs.python.org/3.12/c-api/memory.html#c.PYMEM_DOMAIN_MEM
PyMem_Malloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyMem_Malloc
PYMEM_DOMAIN_OBJ	https://docs.python.org/3.12/c-api/memory.html#c.PYMEM_DOMAIN_OBJ
PyObject_Malloc()	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_Malloc
--without-pymalloc	https://docs.python.org/3.12/using/configure.html#cmdoption-without-pymalloc
PYTHONMALLOC	https://docs.python.org/3.12/using/cmdline.html#envvar-PYTHONMALLOC
¶	https://docs.python.org/3.12/c-api/memory.html#customize-pymalloc-arena-allocator
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyObjectArenaAllocator
PyObjectArenaAllocator	https://docs.python.org/3.12/c-api/memory.html#c.PyObjectArenaAllocator
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_GetArenaAllocator
PyObjectArenaAllocator	https://docs.python.org/3.12/c-api/memory.html#c.PyObjectArenaAllocator
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyObject_SetArenaAllocator
¶	https://docs.python.org/3.12/c-api/memory.html#tracemalloc-c-api
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyTraceMalloc_Track
tracemalloc	https://docs.python.org/3.12/library/tracemalloc.html#module-tracemalloc
¶	https://docs.python.org/3.12/c-api/memory.html#c.PyTraceMalloc_Untrack
tracemalloc	https://docs.python.org/3.12/library/tracemalloc.html#module-tracemalloc
¶	https://docs.python.org/3.12/c-api/memory.html#examples
Overview	https://docs.python.org/3.12/c-api/memory.html#memoryoverview
PyObject_New	https://docs.python.org/3.12/c-api/allocation.html#c.PyObject_New
PyObject_NewVar	https://docs.python.org/3.12/c-api/allocation.html#c.PyObject_NewVar
PyObject_Del()	https://docs.python.org/3.12/c-api/allocation.html#c.PyObject_Del
Table of Contents	https://docs.python.org/3.12/contents.html
Memory Management	https://docs.python.org/3.12/c-api/memory.html
Overview	https://docs.python.org/3.12/c-api/memory.html#overview
Allocator Domains	https://docs.python.org/3.12/c-api/memory.html#allocator-domains
Raw Memory Interface	https://docs.python.org/3.12/c-api/memory.html#raw-memory-interface
Memory Interface	https://docs.python.org/3.12/c-api/memory.html#memory-interface
Object allocators	https://docs.python.org/3.12/c-api/memory.html#object-allocators
Default Memory Allocators	https://docs.python.org/3.12/c-api/memory.html#default-memory-allocators
Customize Memory Allocators	https://docs.python.org/3.12/c-api/memory.html#customize-memory-allocators
Debug hooks on the Python memory allocators	https://docs.python.org/3.12/c-api/memory.html#debug-hooks-on-the-python-memory-allocators
The pymalloc allocator	https://docs.python.org/3.12/c-api/memory.html#the-pymalloc-allocator
Customize pymalloc Arena Allocator	https://docs.python.org/3.12/c-api/memory.html#customize-pymalloc-arena-allocator
tracemalloc C API	https://docs.python.org/3.12/c-api/memory.html#tracemalloc-c-api
Examples	https://docs.python.org/3.12/c-api/memory.html#examples
Python Initialization Configuration	https://docs.python.org/3.12/c-api/init_config.html
Object Implementation Support	https://docs.python.org/3.12/c-api/objimpl.html
Report a Bug	https://docs.python.org/3.12/bugs.html
Show Source	https://github.com/python/cpython/blob/main/Doc/c-api/memory.rst
index	https://docs.python.org/3.12/genindex.html
modules	https://docs.python.org/3.12/py-modindex.html
next	https://docs.python.org/3.12/c-api/objimpl.html
previous	https://docs.python.org/3.12/c-api/init_config.html
Python	https://www.python.org/
3.12.12 Documentation	https://docs.python.org/3.12/index.html
Python/C API Reference Manual	https://docs.python.org/3.12/c-api/index.html
Memory Management	https://docs.python.org/3.12/c-api/memory.html
Copyright	https://docs.python.org/3.12/copyright.html
History and License	https://docs.python.org/license.html
Please donate.	https://www.python.org/psf/donations/
Found a bug	https://docs.python.org/bugs.html
Sphinx	https://www.sphinx-doc.org/

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