Getting output as character and it's occurrence in the string

The input I gave is like this

Input- abccdddeffg

and the output I want is character and it’s occurrence number

Output- a1b1c2d3e1f2g1

my code

uni = []
string = 'abcccdd'
for i in range(0, len(string)):
    for j in range(i+1, len(string)):
        if (string[i] == string[j]):
            uni.append(string[i])
            
for oc in uni:
    cou= uni.count(oc)
    print(oc,cou)

Thanks in advance

>Solution :

You can use the Counter from collections to get the count of every character in the list. Then use a forloop to generate your result and use set to make sure no character is repeated in the result.

from collections import Counter    
string = "abccdddeffg"
counts = Counter(string)
sets = set()
result = []

for s in string:
    if s not in sets:
        result.append(f"{s}{counts[s]}")
    sets.add(s)

result = ''.join(result)
print(result)