How to complete matching details in Python matching

Python matching has many precautions when we use it. We will encounter many problems during continuous learning. Next we will take a detailed look at how to better master the related Python matching technical issues. Regular Expression object version

 
 

  
  
Rereobj = re. compile (r "\ Z") # End with \ Z at the end of the regular expression
  
  
If reobj. match (subject ):
  
  
Do_something ()
  
  
Else:
  
  
Do_anotherthing ()
 
 

Create a regular expression object and obtain Python matching details through this object.

 
 

  
  
rereobj = re.compile(regex)  
  
  
match = reobj.search(subject)  
  
  
if match:  
  
  
# match start: match.start()  
  
  
# match end (exclusive): match.end()  
  
  
# matched text: match.group()  
  
  
do_something()  
  
  
else:  
  
  
do_anotherthing() 
 
 

Obtain a Python matched substring using a regular expression object

 
 

  
  
rereobj = re.compile(regex)  
  
  
match = reobj.search(subject)  
  
  
if match:  
  
  
result = match.group()  
  
  
else:  
  
  
result = "" 
 
 

Obtain the Python-matched substring of the capture group using the regular expression object

 
 

  
  
rereobj = re.compile(regex)  
  
  
match = reobj.search(subject)  
  
  
if match:  
  
  
result = match.group(1)  
  
  
else:  
  
  
result = "" 
 
 

Use a regular expression object to obtain the Python-matched substring of a famous group

 
 

  
  
rereobj = re.compile(regex)  
  
  
match = reobj.search(subject)  
  
  
if match:  
  
  
result = match.group("groupname")  
  
  
else:  
  
  
result = "" 
 
 

Use a regular expression object to obtain all Python matched substrings and put them in an array

 
 

  
  
rereobj = re.compile(regex)  
  
  
result = reobj.findall(subject) 
 
 

Traverse all Python matched substrings by using a regular expression object

 
 

  
  
rereobj = re.compile(regex)  
  
  
for match in reobj.finditer(subject):  
  
  
# match start: match.start()  
  
  
# match end (exclusive): match.end()  
  
  
# matched text: match.group 
 
 

The above is a detailed introduction to Python matching.