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# -*- coding: utf-8 -*-
# size.py
# Copyright (C) 2014 LEAP
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
Recursively get size of objects.
"""
from gc import collect
from itertools import chain
from sys import getsizeof
def _get_size(item, seen):
known_types = {dict: lambda d: chain.from_iterable(d.items())}
default_size = getsizeof(0)
def size_walk(item):
if id(item) in seen:
return 0
seen.add(id(item))
s = getsizeof(item, default_size)
for _type, fun in known_types.iteritems():
if isinstance(item, _type):
s += sum(map(size_walk, fun(item)))
break
return s
return size_walk(item)
def get_size(item):
"""
Return the cumulative size of a given object.
Currently it supports only dictionaries, and seemingly leaks
some memory, so use with care.
:param item: the item which size wants to be computed
:rtype: int
"""
seen = set()
size = _get_size(item, seen)
del seen
collect()
return size
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