python:
循环else:
while true:
if x>1:
print()
break
else:
print()
文件循环:
for line in open(‘test.txt’):
print(line,end=’’)
获得enumerate:
S=’spam‘
for( offset, item) in enumrate(S):
print(item, ‘appear is’, offset)
备注:
zip函数,使用for循环并行使用多个序列