Regular Expressions: Get number of matches

[Xx r3negade]

How do you return the number of times a certain pattern has been matched in a string?

[kaarthikeyapreyan]

Hey try this it would match the pattern for the string given

#! /usr/bin/env python
### Program to match the given sequence in a word

def pattern():
  """
  Search for a pattern in a string
  """
  count = 0
  rex=raw_input("Enter the pattern : ")
  mystr=raw_input("Enter the string : ")
  patlen = len(rex)
  word_split=group(patlen,mystr)
  
  for j in word_split :
    if j == rex :
      count = count + 1
      
  if rex in word_split :
    print "Pattern Found %d time(s)"%count 
  else :
    print "Pattern not found"

def group(exprlength,word):
  """
  group characters for a given length
  """
  strlist = []
  i = 0
  for count in word :
    relpat = word[i:i+exprlength]
    if len(relpat) == exprlength:
      strlist.append(relpat)
      i = i +1
  return strlist

pattern()

[Smygis]

You use the len functon.

[code=python]
>>> import re
>>> txt = open("mess.text ").read()
>>> len(txt)
101250
>>> rexp = re.compile(r"re gexp here*")
>>> match = rexp.findall(tx t)
>>> len(match)
10
[/code]

* Censored due to being the sulution for a puzzle in pythonchallange . :)

w00t, no python highlighting for the code?

[jlm699]

w00t, no python highlighting for the code?

This has been an issue for some time now. Nobody has acknowledged it aside from one of the Moderators. I miss the python highlights :(

P.S. If a moderator is reading this do you have any idea why this is happening or could you contact an admin and try to figure out when it will be back?

[Laharl]

They're discussing it here.