Test a String for a Substring?

2018-06-02 14:01:14

This question already has an answer here:

Does Python have a string 'contains' substring method? 13 answers

if "ABCD" in "xxxxABCDyyyy":
    # whatever

除了使用“in”运算符（最简单）之外，还有其他几种方法

index()

>>> try :
...   "xxxxABCDyyyy".index("test")
... except ValueError:
...   print "not found"
... else:
...   print "found"
...
not found

find()

>>> if "xxxxABCDyyyy".find("ABCD") != -1:
...   print "found"
...
found

re

>>> import re
>>> if re.search("ABCD" , "xxxxABCDyyyy"):
...  print "found"
...
found

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