[may be duplicate) How to read a number from a file and use it as a variable?

Question

I'm new to python so this is most likely basic knowledge, but how do I read a number from a text file and use it as a variable? I'm trying to make a game where it counts your points and saves it to a plain text file, and when you first run the game it checks for that file and reads the points from your last session. I tried this but it didnt work:

for saving:

    def save():
        with open('gameSave.txt', 'w') as f:
            for points in points:
                f.write('%d' % points)

for loading:

with open("gameSave.txt", "r", encoding="utf-8") as g:
   points = g.readlines()

can anyone help? The points just need to be loaded and save as an integer but i can't figure out how.

What is `for points in points` supposed to do? Since you recognize that this may be a duplicate, did you try looking for one first? — Pranav Hosangadi, Jul 05 '22 at 18:03
Does this answer your question? [How to read numbers from file in Python?](https://stackoverflow.com/questions/6583573/how-to-read-numbers-from-file-in-python) — Pranav Hosangadi, Jul 05 '22 at 18:03
`points = [int(p) for p in g.readlines()]` to restore integer array? — STerliakov, Jul 05 '22 at 18:04
@PranavHosangadi i dont know what to ask google so i searched some random things but nothing helped me — Boranbruh, Jul 05 '22 at 18:50
@SUTerliakov what it an "integer array"? i stole that code from someone else lol — Boranbruh, Jul 05 '22 at 18:50

score 0 · Answer 1 · answered Jul 05 '22 at 18:45

Write two discrete functions. One to save accumulated points and the other to retrieve what may have previously been saved. Something like this:

FILENAME = 'gameSave.txt'

def getSavedPoints():
    try:
        with open(FILENAME) as data:
            return int(data.read())
    except FileNotFoundError:
        return 0

def savePoints(points):
    with open(FILENAME, 'w') as data:
        data.write(str(points))

points = getSavedPoints()

# play game and accumulate points

points += 100

savePoints(points)

print(getSavedPoints())

So let's assume that no points have previously been saved then the output from this would be:

l -_- l · Accepted Answer · 2022-07-05T18:42:50.847

-2

Store one number only

points = 200

# Store points
f = open("points.txt", "w")
f.write(str(points))
f.close()

# Retrieve them now
f = open("points.txt", "r")
points = int(f.read())

Cheers

edited Jul 05 '22 at 18:42

answered Jul 05 '22 at 18:07

l -_- l

618
4
15

[may be duplicate) How to read a number from a file and use it as a variable?

2 Answers2

Store one number only