quick collection counter

coutner.py

import collections

string = "aaaBBBcccDDD"
line = str()
counter = collections.Counter(string)
for key, value in counter.items():
  line +=(f'{key}: {value} ')   
print(line)  

import collections
...
... string = "aaaAAAABBBbbbcccCCCDDDdddEEffFFe"
... line = str()
... counter = collections.Counter(string)
... for key, value in counter.items():
... line +=(f'{key}: {value} ')
... print(line)
...
a: 3 A: 4 B: 3 b: 3 c: 3 C: 3 D: 3 d: 3 E: 2 f: 2 F: 2 e: 1