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# -*- coding: utf-8 -*-
##############################################################################
#
# mis_builder module for Odoo, Management Information System Builder
# Copyright (C) 2014-2015 ACSONE SA/NV (<http://acsone.eu>)
#
# This file is a part of mis_builder
#
# mis_builder is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License v3 or later
# as published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# mis_builder 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 Affero General Public License v3 or later for more details.
#
# You should have received a copy of the GNU Affero General Public License
# v3 or later along with this program.
# If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################
def _sum(l):
""" Same as stdlib sum but returns None instead of 0
in case of empty sequence.
>>> sum([1])
1
>>> _sum([1])
1
>>> sum([1, 2])
3
>>> _sum([1, 2])
3
>>> sum([])
0
>>> _sum([])
"""
if not l:
return None
return sum(l)
def _avg(l):
""" Arithmetic mean of a sequence. Returns None in case of empty sequence.
>>> _avg([1])
1.0
>>> _avg([1, 2])
1.5
>>> _avg([])
"""
if not l:
return None
return sum(l) / float(len(l))
def _min(*args):
""" Same as stdlib min but returns None instead of exception
in case of empty sequence.
>>> min(1, 2)
1
>>> _min(1, 2)
1
>>> min([1, 2])
1
>>> _min([1, 2])
1
>>> min(1)
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: 'int' object is not iterable
>>> _min(1)
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: 'int' object is not iterable
>>> min([1])
1
>>> _min([1])
1
>>> min()
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: min expected 1 arguments, got 0
>>> _min()
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: min expected 1 arguments, got 0
>>> min([])
Traceback (most recent call last):
File "<stdin>", line 1, in ?
ValueError: min() arg is an empty sequence
>>> _min([])
"""
if len(args) == 1 and not args[0]:
return None
return min(*args)
def _max(*args):
""" Same as stdlib max but returns None instead of exception
in case of empty sequence.
>>> max(1, 2)
2
>>> _max(1, 2)
2
>>> max([1, 2])
2
>>> _max([1, 2])
2
>>> max(1)
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: 'int' object is not iterable
>>> _max(1)
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: 'int' object is not iterable
>>> max([1])
1
>>> _max([1])
1
>>> max()
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: max expected 1 arguments, got 0
>>> _max()
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: max expected 1 arguments, got 0
>>> max([])
Traceback (most recent call last):
File "<stdin>", line 1, in ?
ValueError: max() arg is an empty sequence
>>> _max([])
"""
if len(args) == 1 and not args[0]:
return None
return max(*args)
if __name__ == "__main__":
import doctest
doctest.testmod()