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# -*- coding: utf-8 -*-
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# This file is part of pygal
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#
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# A python svg graph plotting library
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# Copyright © 2012-2014 Kozea
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#
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# This library is free software: you can redistribute it and/or modify it under
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# the terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 3 of the License, or (at your option) any
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# later version.
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#
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# This library is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with pygal. If not, see <http://www.gnu.org/licenses/>.
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"""
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Value adapters to use when a chart doesn't accept all value types
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"""
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import datetime
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from numbers import Number
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from pygal.i18n import COUNTRIES
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def positive(x):
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if x is None:
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return
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if x < 0:
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return 0
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return x
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def not_zero(x):
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if x == 0:
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return
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return x
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def none_to_zero(x):
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return x or 0
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def date(x):
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# Make int work for date graphs by counting days number from now
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if isinstance(x, Number):
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try:
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d = datetime.date.today() + datetime.timedelta(days=x)
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return datetime.datetime.combine(d, datetime.time(0, 0, 0))
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except OverflowError:
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return None
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return x
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