Inner function closure

def a():
    x = "python"
    def b():
        print("I am from inner function {0}".format(x))
    b()
a()

def a():
    x = "python" #x 變左private varibles，之後唔可以洗走佢
    def b():
        print("I am from inner function {0}".format(x))
    return b
c = a()
c()