Context Manager in Python
In this example:
FileHandler is a class serving as a context manager.
The _enter_ method is responsible for setting up the context, in this case, opening a file in the specified mode.
The _exit_ method is called when exiting the with block and is responsible for cleaning up, such as closing the file.
When the with block is entered, the file is opened, and when the block is exited, the file is automatically closed. The use of context managers improves code readability and ensures proper resource management.
Python also provides the contextlib module for creating context managers using the contextmanager decorator.
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