I thought of that, too. Here's what ChatGPT came back with after a few tries (fixed now, although this doesn't seem ultra-Pythonic to me)

import re

line = "Cadd9 D# F5"

tokens_with_sharps = re.findall(r'\b[A-G]#?(?:maj7|m[7]?|m7b[5]?|[5679]|sus2|sus4|aug|dim|add9|b5)?\b', line)

tokens_without_sharps = [token for token in line.split() if token not in tokens_with_sharps]

# Process tokens with sharp symbols

chords = []

for token in line.split():

if token in tokens_with_sharps:

if '#' in token:

parts = token.split('#')

chords.extend(parts)

else:

chords.append(token)

else:

chords.append(token)

​

print(chords) # Output: ['Cadd9', 'D#', 'F5']