I am trying to swap two variables with a Function....

[walkinrain]

The parameters are exchanged within the function and do not affect the value of the variable with the same name outside the function.
example:

a = 100
b = 200
 
def swap(a, b):
    x=a
    a=b
    b=x
    # The above code is equivalent to  "a, b=b, a"
    return a,b

def swap2():
    global a,b
    a,b=b,a
x,y = swap (a, b)
 
print (f"a={a},b={b},x={x},y={y}")
swap2()
print (a,b)

output:

Output:
a=100,b=200,x=200,y=100
200 100