Regular expressions exercise 1

1. Run this program. What does it do? What does the method end() do which you can call on an SRE_Match object (the resulting object you get from a regular expression search)?

2. Modify the program so it finds the indices of all letters in the string.

3. Write a new program that reads in some python program file and uses regular expressions to find all
   print "< something >"
   statements in the file and prints out all the "< something >"'s. E.g., if the program you read in contains the sentence
   print "Account balance:", balance
   your new program should print "Account balance:".

import re
              
reg = "\d"
text = "012345abcd"

start_index = 0

SRE_Match = re.compile( reg )
result = SRE_Match.search( text[start_index: ] ) 

while result:
    print result.group(), "found at index", (result.end() + start_index -1)
    start_index += result.end()
    result = SRE_Match.search( text[start_index: ] )