a newbie regex question

Jonathan Gardner jgardner at jonathangardner.net
Thu Jan 24 22:41:04 CET 2008

On Jan 24, 12:14 pm, Shoryuken <sakradevanamin... at gmail.com> wrote:
> Given a regular expression pattern, for example, \([A-Z].+[a-z]\),
> print out all strings that match the pattern in a file
> Anyone tell me a way to do it? I know it's easy, but i'm completely
> new to python
> thanks alot

You may want to read the pages on regular expressions in the online
documentation: http://www.python.org/doc/2.5/lib/module-re.html

The simple approach works:

  import re

  # Open the file
  f = file('/your/filename.txt')

  # Read the file into a single string.
  contents = f.read()

  # Find all matches in the string of the regular expression and
iterate through them.
  for match in re.finditer(r'\([A-Z].+[a-z]\)', contents):
    # Print what was matched
    print match.group()

More information about the Python-list mailing list