Splitting school class format in python

main.py

>>> import re
>>> str = "10abc9df7a8z"
>>> searcher = re.compile("[0-9]+[a-zA-Z]+")
>>> blocks = searcher.findall(str)
>>> blocks
['10abc', '9df', '7a', '8z']
 
>>> searcher = re.compile("[0-9]+|[a-zA-Z]+")
>>> parts = [searcher.findall(block) for block in blocks]
>>> parts
[['10', 'abc'], ['9', 'df'], ['7', 'a'], ['8', 'z']]
 
>>> classes = [[part[0] + chr for chr in part[1]] # part[0] ist die nummer
                for part in parts]                # part[1] sind die buchstaben
>>> classes
[['10a', '10b', '10c'], ['9d', '9f'], ['7a'], ['8z']]
 
>>> sum(classes, [])
['10a', '10b', '10c', '9d', '9f', '7a', '8z']