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in this code there are two Random Number Generators. One in the first line, the other in the function btn_yes.

Both RNG's work fine, the print(nb) directly after the generator in the function btn_yes displays a random number like it should.

However, when btn_press is activated after btn_yes was activated (like it should in the program), the value of nb doesn't change, no matter how often i execute btn_yes. btn_press just uses the same number that was generated by the first RNG.

What am I missing?

nb = random.randrange(0, 11)

def btn_press():
    guess = int(entry.get())
    print(guess)
    if guess < nb:
        answ["text"] = "Higher!"
    elif guess > nb:
        answ["text"] = "Lower!"
    elif guess == nb:
        answ["text"] = "Correct!"
        btn2["bg"] = "#FF6C6C"
        btn3["bg"] = "#32FF00"
        
def btn_no():
    window.destroy()

def btn_yes():
    answ["text"] = "Next Round! Type in a new number!"
    btn2["bg"] = "#464646"
    btn3["bg"] = "#464646"
    nb = random.randrange(0, 11)
    entry.delete(0, tk.END)
    print(nb)
Jantro
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  • Make sure your code is a [minimal reproducible example](https://stackoverflow.com/help/minimal-reproducible-example). Your sample needs to define imports and globals(?) like `entry`. I'd guess it has to do with the cursor/positioning in `entry`. – webelo May 03 '22 at 20:53

1 Answers1

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The problem here is that when you change a global variable inside a function, you need to put global <variablename> as the first line in the function. Otherwise, Python assumes you meant to make a new variable with that name that is only in scope inside the function, and the global variable remains unchanged.

You can see this by printing nb inside the function btn_yes(); you should see that it has a different value each time (and not the same value as the global nb).

In this case, if you put global nb as the first line in btn_yes(), it should have the desired effect.

See using global variables in a function

Esther
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