Python3正則表達式：match函數

import re

url = "www.baidu.com"

# 匹配包含www的字符串
re_compile = re.compile("www")

# match從起始位置開始匹配，且只匹配一次，如果不沒找到，則返回None
match = re_compile.match(url)

# .span用來獲取匹配到的字符串所對應的下標位置
#re_compile.match(url).span()

# match返回的是match對象，獲取值使用group
print(match.group())

import re

line = "Cats are smarter than dogs"
# .* 表示任意匹配除換行符（\n、\r）之外的任何單個或多個字符
matchObj = re.match(r'(.*) are (.*) .*', line, re.M | re.I)

if matchObj:
    print("matchObj.group() : ", matchObj.group())
    print("matchObj.group(1) : ", matchObj.group(1))
    print("matchObj.group(2) : ", matchObj.group(2))
else:
    print("No match!!")

 

D:\Python37\python.exe D:/Python-study/reTest.py
www
matchObj.group() :  Cats are smarter than dogs
matchObj.group(1) :  Cats
matchObj.group(2) :  smarter than

Process finished with exit code 0