Why does reading with `open(False)` work?

Question

Why does this work?

with open(False) as f: s = f.read()

I know this is an unimportant question but answers I've heard so far about OI open and waiting for an EOF token just doesn't seem to make sense as I've gotten this to work for True 1 and 0

False has an integer value of 0. My guess is that open is treating it as a file descriptor. — Patrick Haugh
– Patrick Haugh, Commented Jan 16, 2020 at 18:57

chepner · Accepted Answer · 2020-01-16 18:57:48Z

3

open can take an integer representing an existing file descriptor, and False (aka 0) is the file descriptor for standard input.

answered Jan 16, 2020 at 18:57

chepner

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