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38 lines
1.3 KiB
Python
38 lines
1.3 KiB
Python
#!/usr/bin/env python
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#
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# A library that provides a Python interface to the Telegram Bot API
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# Copyright (C) 2015-2016
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# Leandro Toledo de Souza <devs@python-telegram-bot.org>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser Public License for more details.
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#
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# You should have received a copy of the GNU Lesser Public License
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# along with this program. If not, see [http://www.gnu.org/licenses/].
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"""This module contains functions to validate function arguments"""
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try:
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type(basestring)
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except NameError:
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basestring = str
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def validate_string(arg, name):
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"""
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Validate a string argument. Raises a ValueError if `arg` is neither an
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instance of basestring (Python 2) or str (Python 3) nor None.
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Args:
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arg (basestring): The value to be tested
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name (str): The name of the argument, for the error message
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"""
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if not isinstance(arg, basestring) and arg is not None:
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raise ValueError(name + " is not a string")
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