Friday, October 26, 2018
Converting from a string to boolean in Python?
Answer
Answer
Does anyone know how to do convert from a string to a boolean in Python? I found this link. But it doesn't look like a proper way to do it. I.e. using built-in functionality, etc.
The reason I'm asking this is because I learned about int("string") from here. But when trying bool("string") it always returns True:
>>> bool("False")
True
Answer
Really, you just compare the string to whatever you expect to accept as representing true, so you can do this:
s == 'True'
Or to checks against a whole bunch of values:
s.lower() in ['true', '1', 't', 'y', 'yes', 'yeah', 'yup', 'certainly', 'uh-huh']
Be cautious when using the following:
>>> bool("foo")
True
>>> bool("")
False
Empty strings evaluate to False, but everything else evaluates to True. So this should not be used for any kind of parsing purposes.
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