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29 lines
1.2 KiB
Python
29 lines
1.2 KiB
Python
'''
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Created on 4 May 2013
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@author: mike
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'''
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class ValidityRoutines(object):
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"""Class to hold all validation routines, such as type checking"""
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def type_check(self, value, valid_type):
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"""Checks that value is an instance of valid_type, and returns value if it is, or throws a TypeError otherwise"""
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if not isinstance(value, valid_type):
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print(repr(valid_type), repr(type(value).__name__))
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raise TypeError(self.__class__.__name__ + " expected " + valid_type.__name__ + ", not " + type(value).__name__)
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return value
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def class_check(self, klass, valid_class):
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"""Checks that value is an instance of valid_type, and returns value if it is, or throws a TypeError otherwise"""
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if not issubclass(klass, valid_class):
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raise TypeError(self.__class__.__name__ + " expected " + valid_class.__name__ + ", not " + klass.__name__)
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return klass
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def confirm(self, assertion, error):
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"""Acts like an assertion, but will not be disabled when __debug__ is disabled"""
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if not assertion:
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if error is None:
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error = "An unspecified Assertion was not met"
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raise AssertionError(error)
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