Cheng Planning--python Network programming

Class1 Regular Expressions

#定义

Regular expressions are a logical formula for manipulating strings, and through it we can filter out what we need, such as determining whether a string of numbers is a phone number.

#原理

The string of the regular expression is converted to the Pattern object, then the object is used to process the text and the matching result is obtained, and then the other operations are performed according to the result information.

1 #Coding:utf-82 ImportRe3Pattern = Re.compile (r'Hello')#Convert Regular expressions to pattern objects4Match =pattern.match ('hello,cxy!')5 PrintMatch6 7 ifmatch:8     PrintMatch.group ()9 Else:Ten     Print 'Not match' One  APattern2=re.compile (R'Python') -Match2=pattern2.match ('Hello Cxy') - ifMATCH2: the     PrintMatch2.group () - Else: -     Print 'Not match'

Cheng Planning--python Network programming