19 lines
602 B
Python
19 lines
602 B
Python
# Ported from python 3.7 contextlib.py
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class nullcontext(object):
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"""Context manager that does no additional processing.
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Used as a stand-in for a normal context manager, when a particular
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block of code is only sometimes used with a normal context manager:
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cm = optional_cm if condition else nullcontext()
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with cm:
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# Perform operation, using optional_cm if condition is True
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"""
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def __init__(self, enter_result=None):
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self.enter_result = enter_result
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def __enter__(self):
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return self.enter_result
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def __exit__(self, *excinfo):
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pass
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