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Fixed __slots__ sizing. #37

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Fixed __slots__ sizing. #37

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78 changes: 41 additions & 37 deletions recipes/Python/546530_Size_of_Python_objects_revised/recipe-546530.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,29 +3,29 @@
# Copyright, license and disclaimer are at the very end of this file.

# This is the latest, enhanced version of the asizeof.py recipes at
# <http://github.com/ActiveState/code/blob/master/recipes/Python/
# <http://GitHub.com/ActiveState/code/blob/master/recipes/Python/
# 546530_Size_of_Python_objects_revised/recipe-546530.py>,
# <http://code.activestate.com/recipes/546530-size-of-python-objects-revised>
# and <http://code.activestate.com/recipes/544288-size-of-python-objects>.
# <http://Code.ActiveState.com/recipes/546530-size-of-python-objects-revised>
# and <http://Code.ActiveState.com/recipes/544288-size-of-python-objects>.

# Recent versions of this module handle objects like ``namedtuples``,
# ``closure``, and NumPy data ``arange``, ``array``, ``matrix``, etc.
# Sizing of ``__slots__`` has been incorrect before this version.

# See also project Pympler at <https://github.com/pympler/pympler> and
# memory footprint recipe <http://code.activestate.com/recipes/577504/>.

# Tested with 64-bit Python 2.6.9 (and numpy 1.6.2), 2.7.13 (and numpy
# 1.13.1), 3.5.3 and 3.6.2 on macOS 10.12.6 Sierra, with 64-bit Intel-
# Python 3.5.3 (and numpy 1.11.3) on macOS 10.12.6 Sierra and with
# Pythonista 3.1 using 64-bit Python 2.7.12 and 3.5.1 (both with numpy
# 1.8.0) on iOS 10.3.3.
# See also project Pympler at <http://GitHub.com/pympler/pympler> and
# memory footprint recipe <http://Code.ActiveState.com/recipes/577504/>.

# Tested with 64-bit Python 2.7.15 and 3.7.0 on macOS 10.13.5 High Sierra.
# Earlier versions of this module were tested with 32-bit Python 2.2.3,
# 2.3.7, 2.4.5, 2.5.1, 2.5.2, 2.6.2, 3.0.1 or 3.1a2 on CentOS 4.6, SuSE
# 9.3, MacOS X 10.3.9 Panther (PPC), MacOS X 10.4.11 Tiger, Solaris 10
# (Opteron) and Windows XP, with 64-bit Python 3.0.1 on RHEL 3u7 and
# Solaris 10 (Opteron) and with 64-bit Python 2.7.10 and 3.5.1 on MacOS
# X 10.11.5 El Capitan (all without numpy).
# X 10.11.5 El Capitan (all without numpy) and with 64-bit Python 2.6.9
# (and numpy 1.6.2), 2.7.13 (and numpy 1.13.1), 3.5.3 and 3.6.2 on macOS
# 10.12.6 Sierra, with 64-bit Intel-Python 3.5.3 (and numpy 1.11.3) on
# macOS 10.12.6 Sierra and with Pythonista 3.1 using 64-bit Python 2.7.12
# and 3.5.1 (both with numpy 1.8.0) on iOS 10.3.3.

# This module was checked statically with PyChecker 0.8.12, PyFlakes
# 1.5.0, PyCodeStyle 2.3.1 (formerly Pep8) and McCabe 0.6.1 using Python
Expand Down Expand Up @@ -208,7 +208,7 @@ class and the ``... def`` suffix marks the *definition object*.
.. [#bi] ``Type``s and ``class``es are considered built-in if the
``__module__`` of the type or class is listed in the private
``_builtin_modules``.
'''
''' # PYCHOK \_
import sys
if sys.version_info < (2, 6, 0):
raise NotImplementedError('%s requires Python 2.6 or newer' % ('asizeof',))
Expand All @@ -225,7 +225,7 @@ class and the ``... def`` suffix marks the *definition object*.
__all__ = ['adict', 'asized', 'asizeof', 'asizesof',
'Asized', 'Asizer', # classes
'basicsize', 'flatsize', 'itemsize', 'alen', 'refs']
__version__ = '17.08.24'
__version__ = '18.07.04'

# any classes or types in modules listed in _builtin_modules are
# considered built-in and ignored by default, as built-in functions
Expand Down Expand Up @@ -430,9 +430,9 @@ def _dir2(obj, pref='', excl=(), slots=None, itor=''):
a = '_' + c.__name__ + a
if hasattr(obj, a):
s.setdefault(a, getattr(obj, a))
# assume __slots__ tuple/list
# is holding the attr values
yield slots, _Slots(s) # _keys(s)
# assume a __slots__ tuple is holding the values
# yield slots, _Slots(s) # _keys(s) ... REMOVED,
# see _Slots.__doc__ further below
for t in _items(s):
yield t # attr name, value
elif itor: # iterator referents
Expand Down Expand Up @@ -683,8 +683,9 @@ def _cell_refs(obj, named):
def _class_refs(obj, named):
'''Return specific referents of a class object.
'''
return _refs(obj, named, '__class__', '__dict__', '__doc__', '__mro__',
'__name__', '__slots__', '__weakref__')
return _refs(obj, named, '__class__', '__doc__', '__mro__',
'__name__', '__slots__', '__weakref__',
'__dict__') # __dict__ last


def _co_refs(obj, named):
Expand Down Expand Up @@ -966,10 +967,11 @@ def _len_slice(obj):
return 0


def _len_slots(obj):
'''Slots length.
'''
return len(obj) - 1
# REMOVED, see _Slots.__doc__
# def _len_slots(obj):
# '''Slots length.
# '''
# return len(obj) - 1


def _len_struct(obj):
Expand All @@ -990,7 +992,7 @@ def _len_unicode(obj):
_all_lens = (None, _len, _len_array, _len_bytearray, _len_code,
_len_dict, _len_frame, _len_int, _len_iter,
_len_list, _len_module, _len_numpy, _len_set,
_len_slice, _len_slots, _len_struct, _len_unicode)
_len_slice, _len_struct, _len_unicode) # _len_slots

# more private functions and classes

Expand Down Expand Up @@ -1125,13 +1127,15 @@ def __init__(self, name, ref):
self.ref = ref


class _Slots(tuple):
'''Wrapper class for __slots__ attribute at
class instances to account for the size
of the __slots__ tuple/list containing
references to the attribute values.
'''
pass
# class _Slots(tuple):
# '''Wrapper class for __slots__ attribute at class definition.
# The instance-specific __slots__ attributes are stored in
# a "tuple-like" space inside the instance, see Luciano
# Ramalho, "Fluent Python", page 274+, O'Reilly, 2016 or
# at <http://Books.Google.com/books>, then search for
# "Fluent Python" "Space Savings with the __slots__".
# '''
# pass


# kinds of _Typedefs
Expand Down Expand Up @@ -1323,11 +1327,11 @@ def _typedef_code(t, base=0, refs=None, kind=_kind_static, heap=False):
_typedef_both(type(Ellipsis))
_typedef_both(type(None))

# _Slots is a special tuple, see _Slots.__doc__
_typedef_both(_Slots, item=_sizeof_Cvoidp,
alen=_len_slots, # length less one
refs=None, # but no referents
heap=True) # plus head
# _Slots are "tuple-like", REMOVED see _Slots.__doc__
# _typedef_both(_Slots, item=_sizeof_Cvoidp,
# leng=_len_slots, # length less one
# refs=None, # but no referents
# heap=True) # plus head

# dict, dictproxy, dict_proxy and other dict-like types
_dict_typedef = _typedef_both(dict, item=_sizeof_CPyDictEntry, alen=_len_dict, refs=_dict_refs)
Expand Down Expand Up @@ -2627,7 +2631,7 @@ def refs(obj, **opts):
# License from the initial version of this source file follows:

# --------------------------------------------------------------------
# Copyright (c) 2002-2017 -- ProphICy Semiconductor, Inc.
# Copyright (c) 2002-2018 -- ProphICy Semiconductor, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
Expand Down