为什么我在 function 下面出现 unboundLocalError？

Question

x=23

def printer():
    
    print(x)

    x=x+1

    return x

printer()

Error: UnboundLocalError: local variable 'x' referenced before assignment

Answer 1

Use global keyword to fix the issue

def printer():

    global x
    
    print(x)

    x=x+1

    return x