36 lines
979 B
Python
36 lines
979 B
Python
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# This file is part of Hypothesis, which may be found at
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# https://github.com/HypothesisWorks/hypothesis/
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#
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# Copyright the Hypothesis Authors.
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# Individual contributors are listed in AUTHORS.rst and the git log.
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#
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# This Source Code Form is subject to the terms of the Mozilla Public License,
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# v. 2.0. If a copy of the MPL was not distributed with this file, You can
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# obtain one at https://mozilla.org/MPL/2.0/.
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import threading
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from contextlib import contextmanager
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class DynamicVariable:
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def __init__(self, default):
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self.default = default
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self.data = threading.local()
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@property
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def value(self):
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return getattr(self.data, "value", self.default)
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@value.setter
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def value(self, value):
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self.data.value = value
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@contextmanager
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def with_value(self, value):
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old_value = self.value
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try:
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self.data.value = value
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yield
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finally:
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self.data.value = old_value
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