if and elif satements in a while loop (in a function) is not changing a variable declared in the fun-CodePudding

def hello():
    while True:
        global opened, filepath
        command = input("save or open: ")
        opened = False
        filepath = "Empty"
    
        if command == "save":
            if opened:
                print(f"yes you opened a file {filepath}")
            else:
                print(f"no you didn't open a file {filepath} {opened}")
        elif command == "open":
            filepath = "/home/pi/Desktop/testing.txt"
            opened = True
            print(f"opened {filepath} {opened}")
        else:
            print("typo")

hello()

I want to change the opened and the filepath variable as i've tried to demonstrate but am failing to do so, i need the filepath to change when i want it to, but it doesn't. It just dosen't regester and change both of the variables and prints out Empty and Fasle respectively. btw this is my output:

save or open: open
opened /home/pi/Desktop/testing True
save or open: save
no you didn't open a file Empty False

CodePudding user response：

You are setting opened = True, but you will overwrite it in the next loop iteration with opened = False.

You will need to initialize variables before the while loop.

Also, there is no need to use global here.

CodePudding user response：

def hello():
    opened = False #moved these
    filepath = "Empty"
    while True:
        command = input("save or open: ")
    
        if command == "save":
            if opened:
                print(f"yes you opened a file {filepath}")
            else:
                print(f"no you didn't open a file {filepath} {opened}")
        elif command == "open":
            filepath = "/home/pi/Desktop/testing"
            opened = True
            print(f"opened {filepath} {opened}")
        else:
            print("typo")

hello()

result:

save or open: open
opened /home/pi/Desktop/testing True
save or open: save
yes you opened a file /home/pi/Desktop/testing