python中几个常见正则例子：

匹配手机号：

phone_str = "hey my name is alex, and my phone number is 13651054607, please call me if you are pretty!"
phone_str2 = "hey my name is alex, and my phone number is 18651054604, please call me if you are pretty!"
 
m = re.search("(1)([358]d{9})",phone_str2)
if m:
    print(m.group())

匹配IP V4：

ip_addr = "inet 192.168.60.223 netmask 0xffffff00 broadcast 192.168.60.255"
 
m = re.search("d{1,3}.d{1,3}.d{1,3}.d{1,3}", ip_addr)
 
print(m.group())

分组匹配地址：

contactInfo = 'Oldboy School, Beijing Changping Shahe: 010-8343245'
match = re.search(r'(w+), (w+): (S+)', contactInfo) #分组

match = re.search(r'(?P<last>w+), (?P<first>w+): (?P<phone>S+)', contactInfo)

匹配email：

email = "alex.li@126.com   http://www.oldboyedu.com"
 
m = re.search(r"[0-9.a-z]{0,26}@[0-9.a-z]{0,20}.[0-9a-z]{0,8}", email)
print(m.group())

contactInfo = 'Oldboy School, Beijing Changping Shahe: 010-8343245'

match = re.search(r'(w+), (w+): (S+)', contactInfo) #分组

"""

>>> match.group(1)

  'Doe'

  >>> match.group(2)

  'John'

  >>> match.group(3)

  '555-1212'

"""

match = re.search(r'(?P<last>w+), (?P<first>w+): (?P<phone>S+)', contactInfo)