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[FIX] mis_builder: correct implementation and doctests for _min/_max
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# -*- encoding: 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/>. | ||
# | ||
############################################################################## | ||
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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) | ||
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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)) | ||
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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) | ||
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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) | ||
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if __name__ == "__main__": | ||
import doctest | ||
doctest.testmod() |
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