Split string with multiple delimiters and keep the string in "groups"

[bowlofred]

Is there really something separating each character, or are you just looking for any repeated character? (You use the term "delimiter", but I don't see any).

If you really just want repeated characters, you could do the following. The grouping is a bit odd, but you can pull the repeated strings out of the first part of each tuple.

>>> s = ".nnddd9999999999ddnn."
>>> re.findall(r"((.)\2+)", s)
[('nn', 'n'), ('ddd', 'd'), ('9999999999', '9'), ('dd', 'd'), ('nn', 'n')]

Or if you really just have a few characters and you want all the strings of them, you could do what you did earlier, but add the repetition (+) operator to them:

>>> re.findall(r"(\.+|n+|d+|9+)",s)
['.', 'nn', 'ddd', '9999999999', 'dd', 'nn', '.']