Python的while else

python中有一个其独有的功能，while else.

它的作用是判断是循环是否被终止，如果没有被终止，那么就会执行else,反之则不会执行。还是用一段代码来解释吧

else被执行：

1count = 0
2while count <= 5:
3    print('loop', count)
4    count += 1
5else:
6    print('loop is done...')
7
8print('out of loop')
9
10'''
11loop 0
12loop 1
13loop 2
14loop 3
15loop 4
16loop 5
17loop is done...
18out of loop
19'''

else未被执行：

1count = 0
2while count <= 5:
3    print('loop', count)
4    if count == 3:
5        break
6    count += 1
7else:
8    print('loop is done...')
9
10print('out of loop')
11
12'''
13loop 0
14loop 1
15loop 2
16loop 3
17loop 4
18loop 5
19loop is end...
20out of loop
21'''