[SOLVED] Please explain this statement

Question

print(False== False in [False])

# why output is True ?

Answer 1

Because of Python's comparison chaining feature.

False== False in [False]
is treated as
(False == False) and (False in [False]) which returns True.

Answer 2

Erik Are you familiar with 1 < x < 10?
It's the same thing.

Answer 3

Fascinating, and not obvious at first glance. In other words, these 3 Python expressions:
a == b == c
(a == b) == c
a == (b == c)
...mean 3 different things. In particular, the first one actually means:
(a == b) and (b == c)

Thanks Simba

Answer 4

Yeah the 1 < x < 10 form is familiar, but it somehow seemed different in my head with equality (rather than inequality) comparisons.

I think maybe it was my confusion with this similar-looking (but quite different) idiom:
x = y == 10
...where you do an assignment of a boolean value (to x) based on a comparison (of y).