How to change a specific line in a file, depending on chosen name?

Question

I have a text file where i have numbers and names listed. each number belongs to a specific name, and they belong on the same line. the content of the file, looks like this:

Answer 1

It seems a dictionary would idealy suit the case. I would try this:

names_dictionary = dict()
f = open("hei.txt", "r")
for name, number in zip(f, f):
    names_dictionary[name] = number

to update any number simply:

names_dictionary[name] = any_number