will using list comprehension to read a file automagically call close()

Question

Does the following syntax close the file:

lines = [line.strip() for line in open(\'/somefile/somewhere\')]

Bonus points if you can demonstr

Answer 1

This is how you should do it

with open('/somefile/somewhere') as f:
    lines = [line.strip() for line in f]

In CPython the file should be closed right away as there are no references to it left, but Python language does not guarantee this.

In Jython, the file won't be closed until the garbage collector runs