Split a string based on change of character

[Andrew Savige]

Python beginner here.

For a string 'ABBBCC', I want to produce a list ['A', 'BBB', 'CC'].
That is, break the string into pieces based on change of character.
What's the best way to do this in Python?

Using Python 2.5.1, I tried:

import re
s = re.split(r'(?<=(.))(?!\1)', 'ABBBCC')
for e in s: print e

but was surprised when it printed:

ABBBCC

I expected something like:

A
A
BBB
B
CC
C

(the extra fields because of the capturing parens).

Thanks,
/-\



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