2018-10-09 Python22 if真假
2018-10-09 本文已影响0人
孟圆的笔记
假：
In [1]: if "":
...: print("1")
...:
In [2]: if None:
...: print("2")
...:
In [3]: if 0:
...: print("3")
...:
In [4]: if []:
...: print("4")
...:
In [5]: if {}:
...: print("5")
...:
In [6]: if ():
...: print("6")
...:
真：
In [8]: if not False:
...: print("8")
...:
8
In [9]: if 1:
...: print("9")
...:
9
In [10]: if -1:
....: print("10")
....:
10
In [11]: if "a":
....: print("11")
....:
11
