contextlib is Python module that add utilities for common tasks involving
with statements. And boy! Who does not love the with statements. They make
your code concise, human-readable and less bug prone.
One must already be familiar with the code:
with open(‘foo.bar’) as f:
# do stuff with f
# it automatically closes when you exit
# do something else
However, with contextlib you can bring this magic to your own methods as well.
For example,
from contextlib import closing
from urllib.request import urlopen
with closing(urlopen('http://www.python.org')) as page:
for line in page:
print(line)
The module provide many such utilities or you can also use the decorator
@contextmanager to add same behavior to your own methods. Really neat and
handy!