python3通过按键增加值

Question

这不起作用。我究竟做错了什么？ 错误显示x未定义。我试图用x按键将xx加1。

xx = int()
yy = int()
zz = int()
print(xx, yy, zz)

b = input("New value:")
if b == x:
    then [xx ++ 1]
    print(xx, yy, zz)
else :
    print(xx, yy, zz)

Answer 1

您尚未定义x，因此不会获得任何增量

Answer 2

这有效。

name = 0

xx = int()
yy = int()
zz = int()

while(name == 0):

    b = input("New value:")
    if b == 'x':
            xx += 1
            print(xx, yy, zz)
    elif b == 'y':
            yy += 1
            print(xx, yy, zz)
    elif b == 'z':
            zz += 1
            print(xx, yy, zz)
    elif b == '~':
            break
    else :
            print(xx, yy, zz)
            continue