Python-判断列表(list)是否为空

1.其他表对比判断

列表不为空:

list_1 = [1,2]
list_2 = []
if list_1 != list_2:
    print('list is not none')

 列表为空:

list_1 = []
list_2 = []
if list_1==list_2:
    print('list_1 is none')

2.if 列表判断

列表不为空(空列表等于 False)

list_2 = [1,2]
if list_2:
    print('list_2 is not none')

列表为空:

list_2 = []
if not list_2:
    print('list_2 is none')

3.length列表长度判断

列表为空:

list_3 = []
if len(list_3) == 0:
    print('list_3 is none')

列表不为空: 

list_3 = [1,2]
if len(list):
    print('list_3 is not none')

 

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