Python why doesn't variable change after function? [duplicate]

Answer 1

x = 6
def fun(x):
    y = x**2
    x = y
    return(x)
# Reassign the returned value since the scope changed.
x = fun(x)

OR

x = 6
def fun():
    # generally bad practice here
    global x
    y = x**2
    x = y
fun()