正则search与match的区别

import re

# #1.search和match的区别
# pattern = re.compile(r\'\d+\')
# #match从头开始匹配
# m = pattern.match(\'onetwo12threefour34\',6)
# print(m)
# #(在指定范围内查找 默认全局) 查找 只查一次 后面的8是从位置8开始只查一次
# s = pattern.search(\'onetwo12threefour34\',8)
# print(s)#34
# s = pattern.search(\'onetwo12threefour34\',7)
# print(s)#2
# print(s.group())

#2.分组
pattern = re.compile(r\'(\d+) (\d+)\')
s = pattern.search(\'hello 123 456\')
print(s)
print(type(s.group()))#str类型
print(s.group(1))
print(s.group(2))
print(s.groups())