Why Did My Loop Stop Iterating?

#newlist to add values to newlist = [] # iterate through characters in mystring for i in (mystring): # if a letter, append letter to newlist if i.isalpha(): newlist.

Solution 1:

You can use a regular expression to find groups of characters in brackets or just single characters. The regular expression will return tuples of matches - a match for each side of the regex 'or' (|). For each tuple, only one of the strings will be filled, the other will be an empty string (hence the join)

import re

mystring = 'AC[BC]D[ABD]'
[''.join(x) for x in re.findall(r'\[(\w+)\]|(\w)', mystring)]
# returns:
['A', 'C', 'BC', 'D', 'ABD']

Solution 2:

You can use regex:

import re
mystring = 'AC[BC]D[ABD]'
final_data = re.findall('(?<=\[)\w+(?=\])|\w', mystring)

Output:

['A', 'C', 'BC', 'D', 'ABD']