[Tutor] modify csv textfile

[TGW]

> You can test if one item in your list begins with example like:
> ' example125 oo3 3456'.lstrip()[:7].lower() == 'example'

I think I need to use regex here. Perhaps you will agree.

Input file:
1119|Avail|53|Potato Chips
1234|Avail|53|Potato Chips and salse
1399|Avail|53|potato chips
1445|Avail|64|Pretzels
1490|Avail|64|Pretzels and mustard
etc...

#!/usr/bin/env python
import csv
import re

filename = raw_input("Enter the filename to edit: ")

reader = csv.reader(open(filename, 'rb'), delimiter='|', quoting=csv.QUOTE_NONE)
for row in reader:
    if re.match('potato chips.*', row[4].lower()):
        row[4] = 'Potato Chips'

    if re.match('^pretzels.*', row[4].lower()):
        row[4] = 'Pretzels'

    print row

Row will be variable length, so strip() will not work for me. But neither does my latest attempt ^^