Jak podzielić ciąg na znaki w Pythonie?

list ('Hello world!')

['Hello', 'world!']

>>> print(list('Hello world!'))

['H', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd', '!']

str.split

>>> print('Hello world!'.split())

['Hello', 'world!']

a = "Hello world!"

 listresp = list(map(list, a))

 listff =[]

 print (listresp)

 for charersp in listresp:

 for charfinnal in charersp:

 listff.append(charfinnal)

 print (listff)

 ['H', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd', '!']