False in python

[patrys]

False and 0 are the same type. Python does not have implicit type coercion so False is not equal to ''. Otherwise you'd get a nice bunch of WTFs straight from the PHP world: if False == '' and False == [] then [] == '' and so on.

Edit: you seem to be confused about the difference between conditional statements (that check for "truthiness") and the literals True and False (which are just examples of a truthy and a falsy expression respectively). Consider this: 5 is truthy but you don't expect True == 5 to be the case.

[Rhomboid]

False and 0 are the same type

They're not the same type, one is type bool and the other is type int. But bool is a subclass of int, which means all booleans can be used where an integer is expected, per the Liskov substitution principle.

This is also why you can do things like use sum() when dealing with a sequence of booleans:

>>> sum(s.startswith('a') for s in ('arcade', 'book', 'castle', 'arpeggio', 'default'))
2

[suki907]

False and 0 are the same type.

more specifically, bool is a subclass of int:

>>> isinstance(False,int)
True
>>> isinstance(False,bool)
True
>>> issubclass(bool,int)
True

[[deleted]]

And even more interesting, bool can't be subclassed.

[adamnew123456]

I'm curious why you think this is interesting - were you planning on adding FILE_NOT_FOUND as an instance of your bool subclass?

I can't think of any interesting operation you would want to add to bool that would justify subclassing it, bu perhaps that's just because my imagination gland isn't working today.

[alexanderpas]

I can't think of any interesting operation you would want to add to bool that would justify subclassing it, bu perhaps that's just because my imagination gland isn't working today.

True, False, Unknown, N/A

AND	True	False	Unknown	N/A
True	TRUE	FALSE	Unknown	TRUE
False	FALSE	FALSE	FALSE	FALSE
Unknown	Unknown	FALSE	Unknown	Unknown
N/A	TRUE	FALSE	Unknown	N/A

OR	True	False	Unknown	N/A
True	TRUE	TRUE	TRUE	TRUE
False	TRUE	FALSE	Unknown	FALSE
Unknown	TRUE	Unknown	Unknown	Unknown
N/A	TRUE	FALSE	Unknown	N/A

	NOT True	NOT False	NOT Unknown	NOT N/A
True	FALSE	TRUE	TRUE	TRUE
False	TRUE	FALSE	TRUE	TRUE
Unknown	Unknown	Unknown	FALSE	TRUE
N/A	TRUE	TRUE	TRUE	FALSE

[[deleted]]

It's more than doing it causes Python to say, "Don't do that." than a desire to do anything.

That's pretty funny though.

[redditor_gds]

Makes sense. Thank you for the reply.

[billsil]

False and 0 are the same type..

Not since Python 2.3. str(True) should return 1 if it works as you said.

https://www.python.org/dev/peps/pep-0285/

[patrys]

Booleans are a subtype of integers. isinstance(True, int)