Matching methods of Python Regular Expressions

We often encounter a lot of difficulties in computer applications. For example, we will list Python Regular Expressions below. We will provide the following matching usage for problems that often occur in Python Regular Expressions, I hope you will have a better understanding of Python Regular Expressions in this article.

1. test whether the regular expression matches all or part of the string.

 
 

  
  
Regex= Ur""# Regular Expression
  
  
If re. search (regex, subject ):
  
  
Do_something ()
  
  
Else:
  
  
Do_anotherthing ()
 
 

2. test whether the regular expression matches the entire string.

 
 

  
  
Regex= Ur"\ Z"# The End Of The regular expression ends with \ Z
  
  
If re. match (regex, subject ):
  
  
Do_something ()
  
  
Else:
  
  
Do_anotherthing ()
 
 

3. Create a matching object and obtain the matching details through the object (Create an object with details about how the regex matches (part of) a string)

 
 

  
  
Regex= Ur""# Regular Expression
  
  
Match=Re. Search (regex, subject)
  
  
If match:
  
  
# Match start: match. start ()
  
  
# Match end (exclusive): atch. end ()
  
  
# Matched text: match. group ()
  
  
Do_something ()
  
  
Else:
  
  
Do_anotherthing ()
  
  
 
 
 

4. Get the substring matched by the regular expression (Get the part of a string matched by the regex)

 
 

  
  
Regex= Ur""# Regular Expression
  
  
Match=Re. Search (regex, subject)
  
  
If match:
  
  
Result=Match. Group ()
  
  
Else:
  
  
Result=""
  
  
 
 
 

5. Get the part of a string matched by a capturing group)

 
 

  
  
Regex= Ur""# Regular Expression
  
  
Match=Re. Search (regex, subject)
  
  
If match:
  
  
Result=Match. Group "groupname ")
  
  
Else:
  
  
Result=""
  
  
 
 
 

6. Get the part of a string matched by a named group)

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