appending to an existing line in a txt file

Question

I have a program to store a persons name and their score, in a txt file in python.

for example this is my current code :

name = input(\"Name: \")
score =         


        

Answer 1

Store the data of the existing file in a dictionary with name as key and list of scores as value. This code will store the existing data to a dictionary, add new score to it and write the dictionary to file with proper formatting.

import os
from collections import defaultdict


def scores_to_dict(file_name):
    """Returns a defaultdict of name / list of scores as key / value"""
    if not os.path.isfile(file_name):
        return defaultdict(list)
    with open(file_name, 'r') as f:
        content = f.readlines()
    content = [line.strip('\n').split(', ') for line in content]
    temp_dict = {line[0]: line[1:] for line in content}
    d = defaultdict(list)
    d.update(temp_dict)
    return d


name = input("Name: ")
score = input("Score: ")

d = scores_to_dict('student_scores.txt')
d[name].append(score)

with open('student_scores.txt', 'w') as f:
    for k, v in d.items():
        f.write(', '.join([k] + v) + '\n')