The `with` keyword
Last Updated: February 3, 2018 12:20 PM UTC
Last edited by:
Joseph <joseph@josephbanks.me>
Initial Commit
THIS IS FAKE DEMO DATA

The with keyword triggers a context manager. Context managers automatically set up and take down data connections, or any other kind of object that implements the magic methods __enter__ and __exit__. 

with open("test.txt", "r") as file:
    do_things(file)
The above code automatically closes file when the with block exits, so you never have to manually do a file.close(). Most connection types, including file readers and database connections, support this.

For more information, read the official docs, watch Corey Schafer\'s context manager video, or see PEP 343.