"Name 'x' is parameter and global" exception

Question

I was wondering why this won't work? I'm fairly new to programming and I'm learning Python.

def convert(x,y):
    while True:
        try:
            global x
            x = int(input("Number: "))
        except ValueError:
            print("Make sure it is a number.")
    while True:
        try:
            global y
            y = int(input("Number: "))
        except ValueError:
            print("Make sure it is a number.")


convert(x,y)

Please tell me how to make this work.

Also, the error I get when I run this is name 'x' is parameter and global.

Ok, I fixed it. This is the correct code.

def convert():
    while True:
        try:
            global number
            number = int(input("Number: "))
            break
        except ValueError:
            print("Make sure it is a number.")
    while True:
        try:
            global number2
            number2 = int(input("Number: "))
            break
        except ValueError:
            print("Make sure it is a number.")


convert()

Answer 1

It's because you're trying to override the parameter x, but you can't. Here's a related question

To fix this, don't name variables that. You're code is pretty much:

x = 'hi'
x = 5
print(x)
# Why isn't this 'hi'?

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By the way, your while loops are going to be running indefinitely. After x = int(input("Number: ")), you may want to add a break. Same for the other loop.