Python how to sum new value to existing one? [closed]

Question

Text file contains:

Matt 25
Matt 22
John 1
John 2
John 5

And I'm trying to calculate their total points with this but now it just adds the number to value and doesn't sum it:

filename = input("Enter the name of the score file: ")

file = open(filename, mode="r")
print("Contestant score:")

score = dict()

for file_line in sorted(file):

    file_line = file_line.split()
    if file_line[0] in score:
        score[file_line[0]] += file_line[1]
    else:
        score[file_line[0]] = file_line[1]

print(score)

file.close()

But print is : {'Matt': '2525', 'John': '125'}

instead of: {'Matt': '50', 'John': '8'}

Answer 1

Change it to

    if file_line[0] in score:
        score[file_line[0]] += int(file_line[1])
    else:
        score[file_line[0]] = int(file_line[1])

file_line[1] is a string, so using the += operator just appends to the string instead of performing mathematic addition.

Answer 2

The problem is that you are doing the operation with strings and not integers, so you are concatenating them instead of adding the values they represent. To fix that add a call to int in both conditions:

score[file_line[0]] = int(file_line[1])

and:

score[file_line[0]] += int(file_line[1])