Python 正则表达式
1 #!/usr/bin/env python 2 #-*- coding:utf-8 -*- 3 import re 4 5 #match 从开头匹配 6 a = re.match("abc","abcdef") 7 print(a) 8 print(a.group()) 9 10 a = re.match("abc","cabcdef") 11 print(a) 12 13 c = re.match("[0-9][0-9]","78d6ef") 14 print(c) 15 print(c.group()) 16 17 c = re.match("[0-9]{0,10}","78d6ef")#匹配0到10次 18 print(c.group()) 19 20 c = re.match("[0-9]{2}","7890d6ef")#匹配两次 21 print(c.group()) 22 23 #findall 匹配所有 24 d = re.findall("[0-9]{1,10}","123abcde45eg") 25 print(d) 26 27 d = re.findall("[a-zA-Z]{1,10}","123abcde45eg") 28 print(d) 29 30 #匹配任意字符 31 e = re.findall(".*","123456abcde") 32 print(e) 33 34 #搜索 35 f = re.search("\d+","75_46.5 4a~bc6@def") 36 print("f is {0}".format(f.group())) 37 38 f = re.search("^\d+$","752343445")#匹配以数字开头和以数字结尾 39 print("f is {0}".format(f.group())) 40 41 #替换 42 g = re.sub("\d+","|","adf75_46.5 4a~bc6@def",count=2)#将匹配的数字替换成|，替换两个，若没有count则全部替换 43 print('g is {0}'.format(g))
<_sre.SRE_Match object; span=(0, 3), match='abc'>
abc
None
<_sre.SRE_Match object; span=(0, 2), match='78'>
78
78
78
['123', '45']
['abcde', 'eg']
['123456abcde', '']
f is 75
f is 752343445
g is adf|_|.5 4a~bc6@def
