Problem: create a map of the letters and indices in a string. My first approach was to loop over the string using range(len(s)), and checking if the letter exists in the map before adding it: s = 'mozzarella' mapped_s = {} for i in range(len(s)): if s[i] in mapped_s: mapped_s[s[i]].append(i) else: mapped_s[s[i]] = [i] print(f' mapped: … Continue reading Map a string in Python with enumerate