What are the differences between the python regular expression functions match () and search ()
This article mainly introduces "what are the differences between python regular expression function match () and search ()". In daily operation, I believe that many people have doubts about the differences between python regular expression function match () and search (). The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods, hoping to help you answer the questions of "what are the differences between python regular expression function match () and search ()"! Next, please follow the editor to study!
The match () function only detects whether the RE matches at the beginning of the string, and search () scans the entire string for a match, that is, match () returns only if the match is successful at position 0, and match () returns none if the start position is not matched successfully.
For example:
#! / usr/bin/env python#-*-coding=utf-8-*-import re text= 'pythontab'm= re.match (r "\ w +", text) if m: print m.group (0) else: print' not match'
The result is: pythontab
And:
#! / usr/bin/env python#-*-coding=utf-8-*-# import re text='@ pythontab'm= re.match (r "\ w +", text) if m: print m.group (0) else: print 'not match'
The result is: not match
Search () scans the entire string and returns the first successful match
For example:
#! / usr/bin/env python#-*-coding=utf-8-*-# import re text= 'pythontab'm= re.search (r "\ w +", text) if m: print m.group (0) else: print' not match'
The result is: pythontab
How about this:
#! / usr/bin/env python#-*-coding=utf-8-*-# import re text='@ pythontab'm= re.search (r "\ w +", text) if m: print m.group (0) else: print 'not match'
The result is: pythontab
At this point, the study on "what is the difference between python regular expression function match () and search ()" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!
