Python实现字符串模糊匹配

  在一个字符串中，有时需对其中某些内容进行模糊匹配以实现条件的判定，如在“你好，hello,world”中判断是否含有“llo”。Python中通过re.search()方法实现，特别地，对于首位起始的内容匹配，也可通过re.match()方法实现。若匹配成功，它们返回一个re.Match对象；若匹配失败，返回None。

re.search()实现模糊匹配

import re

teststr = "你好，hello,world"
print('\n',teststr,'\n')

pattern1 = "llo"
r1 = re.search(pattern1, teststr)
if r1:
    print(pattern1,'匹配成功.')
else:
    print(pattern1,'匹配失败.')


pattern2 = "你好"
r2 = re.search(pattern2, teststr)
if r2:
    print(pattern2,"匹配成功.")
else:
    print(pattern2,"匹配失败.")

re.match()实现首位起始的模糊匹配

teststr = "你好，hello,world"
print('\n',teststr,'\n')

pattern1 = "llo"
r1 = re.match(pattern1, teststr)
if r1:
    print(pattern1,'匹配成功.')
else:
    print(pattern1,'匹配失败.')

pattern2 = "你好"
r2 = re.match(pattern2, teststr)
if r2:
    print(pattern2,"匹配成功.")
else:
    print(pattern2,"匹配失败.")

End.