python regular expression match example

Python uses a regular expression to match the start of a string and print the example. python Regular Expression This

This article mainly introduces the usage of python regular expressions match and search. it analyzes the functions, definitions, and related usage skills of match and search in regular expressions, and has some reference value, for more information about how to use the

=utf-8-*- # Import re text = ' @pythontab ' m = Re.search (r) \w+ ", text) if m: print m.group (0) else: print ' not match ' The result: Pythontab Summarize: Python regular expression match () function If you do not create pattern objects, we can use the

(text2):... print (' Yes ').. else:... print (' No ')...No4. Using the FindAll () methodMatch () always starts from the string to match, if you want to find the pattern where any part of the string appears, use the FindAll () method instead. Like what:>>> Text = ' Today is 11/27/2012. Pycon starts 3/13/2013. '>>> Datepat.findall (text)[' 11/27/2012 ', ' 3/13/2013 ']5: Group () method to capture groupingwhen you define a

Python's regular expression defaults to "greedy match", that is, in the case of a second meaning, match the longest string as possible, followed by a question mark after the curly brace of the regular expression, can become non-gr

This article mainly introduced the Python regular expression match and search usage, the example analyzed the regular expression in match an

This example describes the Python regular expression match and search usage. Share to everyone for your reference. The specific analysis is as follows: Python provides the main regular

This article mainly introduces the UTF-8 Regular Expression how to match Chinese characters, a small partner can refer to determine whether the input content contains illegal characters, please refer to the following code $ Str = "programming"; // if (! Preg_match ("/^ [\ x {4e00}-\ x {9fa5} A-Za-z0-9 _] + $/u", $ str )) // UTF-8 Chinese characters, letters, nu

[Regular expression] how to quot; match to end or end with a string quot ;. for example, both MV amp; id = 17328895840 amp; scm = 102 and MV amp; id = 17328895840 can be matched. example: str nbsp ;= nbsp; M [regular

Match function Binary_re= ' [01]* ' pattern = re.compile (binary_re) m=re.match (binary_re,deststr) if M:print m.group (0) Else:print ' not MatchThe match function is matched from the start of the string, the match fails to return none, the match succeeds,M.group (0) matches the result of the 2.search function binary

the matched string at the index position(expand) (template)Substituting the matched grouping into the template and then returns. The template can be grouped using \id or \gm = Re.search (R ' (\w+)! (\w+) (\w+) ', ' hman! How finny! ') #将匹配的结果带入 print M.expand (R ' resut:\3 \2 \1 ')>>> Resut:finny How HMan(groupdict) ([Default=none])The function is to assign all the groupings that match to and specify the alias, alias as key,

This example describes the Python regular expression match and search usages. Share to everyone for your reference. The specific analysis is as follows: Python provides the main regular