adii1823
41 lines
997 B
Python
41 lines
997 B
Python
# context/manager.class.py
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class MyContextManager:
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def __init__(self):
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print("MyContextManager init", id(self))
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def __enter__(self):
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print("Entering 'with' context")
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return self
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def __exit__(self, exc_type, exc_val, exc_tb):
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print(f"{exc_type=} {exc_val=} {exc_tb=}")
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print("Exiting 'with' context")
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return True
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ctx_mgr = MyContextManager()
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print("About to enter 'with' context")
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with ctx_mgr as mgr:
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print("Inside 'with' context")
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print(id(mgr))
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raise Exception("Exception inside 'with' context")
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print("This line will never be reached")
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print("After 'with' context")
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"""
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$ python context/manager.class.py
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MyContextManager init 140340228792272
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About to enter 'with' context
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Entering 'with' context
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Inside 'with' context
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140340228792272
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exc_type=<class 'Exception'> exc_val=Exception("Exception inside
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'with' context") exc_tb=<traceback object at 0x7fa3817c5340>
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Exiting 'with' context
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After 'with' context
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"""
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