>>> ac="mmjj"
>>> aaa="adfbvbad{}".format(ac)
>>> aaa
'adfbvbadmmjj'
>>> aaa="adfbvbad{}aaa{}".format(ac)
Traceback (most recent call last):
File "<pyshell#12>", line 1, in <module>
aaa="adfbvbad{}aaa{}".format(ac)
IndexError: tuple index out of range
>>> aaa="adfbvbad{}aaa{}".format(ac,ac)
>>> aaa
'adfbvbadmmjjaaammjj'
>>>
标签：adfbvbad,ac,aaa,format,python,字符串,替换 From： https://www.cnblogs.com/xkdn/p/16929039.html