python 中如何匹配字符串

import re

line="this hdr-biz 123 model server 456"

pattern=r"123"

matchObj = re.match( pattern, line)

import re

line="this hdr-biz model server"

pattern=r"hdr-biz"

m = re.search(pattern, line)

import re

line="this hdr-biz model args= server"

patt=r'args='

name = re.sub(patt, "", line)

import re

pattern = re.compile(r'\d+')

import re

line="this hdr-biz model args= server"

patt=r'server'

pattern = re.compile(patt)

result = pattern.findall(line)

import re

it = re.finditer(r"\d+","12a32bc43jf3")

for match in it:

 print (match.group() )

regexp = (r'^(?P<scheme>[a-z][\w\.\-\+]+)?:(//)?'

     r'(?:(?P<username>\w+):(?P<password>[\w\W]+)@|)'

     r'(?P<domain>[\w-]+(?:\.[\w-]+)*)(?::(?P<port>\d+))?/?'

     r'(?P<path>\/[\w\.\/-]+)?(?P<query>\?[\w\.*!=&@%;:/+-]+)?'

     r'(?P<fragment>#[\w-]+)?$')

match = re.search(regexp, url.strip(), re.U)

if match is None:

  raise ValueError('Incorrent url: {0}'.format(url))

url_parts = match.groupdict()

url='https://blog.csdn.net/weixin_40907382/article/明细/79654372'

print(url_parts):{'scheme': 'https', 'username': None, 'password': None, 'domain': 'blog.csdn.net', 'port': None,

'path': '/weixin_40907382/article/明细/79654372', 'query': None, 'fragment': None}