Confusion found with and operator [duplicate]

问题

This question already has answers here:

Does Python support short-circuiting? (3 answers)

Closed 5 years ago.

I get following output with and operator

code

>>>0 and []
0
>>>[] and 0
[]
>>> 0 and ''
0
>>>'' and 0
''

I could not figure out about on what basis I m getting different result on the basis of placing of elements..

回答1:

From the docs on and:

The expression x and y first evaluates x; if x is false, its value is returned; otherwise, y is evaluated and the resulting value is returned.

In your case, because 0, '', and [] all evaluate to False, the first value in each of your expressions is being returned.

来源：https://stackoverflow.com/questions/24369368/confusion-found-with-and-operator