f

Kouhei: Damn, the output of print is too long, I can't see all of it in my terminal.

Rikka: Why don't you use logging and log to a file?

Kouhei: But I don't need those print when I'm finished, they are just for quick debugging.

Rikka: Well, f is for you!

import f

@f    # This will save the output of print() to tmp.log with mode 'w'
def inner():
    print('whatever')

# This will save the output of print() to important.log with mode 'a'
@f(filename='important.log', mode='a')
def inner():
    print('whatever')

with f:
    print('whatever')

with f(filename='important.log', mode='a'):
    print('whatever')

@f(filename='important.log', mode='a', stdout=True)
def inner():
    print('whatever')

with f(filename='important.log', mode='a', stdout=True):
    print('whatever')

pip install p2f

Originally I was planning to call this package f, but without luck, the name has already been taken by another package on pypi. So I name it p2f, but when imported and used, it's still f. I'm lazy, everyone does.

• What does it do? Will @f do anything dangerous?
  All it does is replacing sys.stdout with an opened file within your function, and restore when function ends.

• Why use it? Why not something like python mymodule.py > tmp.log?
  f gives you function-level control over your output. The best thing is, you can just remove the decorator line or comment it out whenever you don't need it.