What is the python keyword “with” used for?

Question

I want to know why we use "with"?

>>> with open('/tmp/workfile', 'r') as f:

...     read_data = f.read()

>>> f.closed

True

Answer 1

Please be informed that in python, the 'with' keyword is used whenever we are dealing with unmanaged resources (like file streams).

It helps us to be certain that a particular resource is "cleaned up" even if exceptions are getting thrown. It is like a 'syntactic sugar' for the try/finally blocks.

You can refer to the below video tutorial for more information regarding the same: