Suppressing print output in python3 with file parameter

Question

I have several functions that I want to set the verbosity level of. Currently, I'm handling it like so:

class Foo:
    def __init__(self, foo_stuff, verbose=True):
        self.print_file = None if verbose else open(os.devnull, 'w')

    def do_stuff(self):
        print('doing stuff', file=self.print_file)

This works, but I don't like that I never close the file self.print_file.

For cleanliness, I'd prefer not to wrap every single print function in a with open(...). I was wondering if anyone could suggest another way of doing this. For this application, I don't think the python logging module will work.

burkay · Accepted Answer · 2018-11-21 00:49:36Z

1

atexit module may help. write a cleanup function in your Foo class and register it by calling

atexit.register(function, args)

to be called before your program exits.

answered Nov 21, 2018 at 0:49

burkay

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2 Comments

Ben Over a year ago

Researching your suggestion lead me to the magic method __del__ (rszalski.github.io/magicmethods). Do you know if this approach works? ...it comes with a warning on this type of operation

burkay Over a year ago

Never used it. Checked the page you linked, it looks promising, I would definitely give it a shot :) But be sure that you read the warnings first.

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