python - Python 中的类型错误 : unsupported types for : 'int' , 'NoneType'

Question

我正在为客户端编写一个程序，该程序通过客户端记录的内置平均值 radio 从服务器接收平均值字符串。我收到一个 TypeError 消息:“不支持的类型:‘int’、‘NoneType’”。

这是我的代码:

from microbit import *
import radio

radio.on()

blink = Image("99999:"
              "99999:"
              "99999:"
              "99999:"
              "99999")


radio.send("power on")

while True:
   incoming = radio.receive()
   if incoming is not None:
      incoming = float(incoming)

   sleep(500 - running_time() % 500)
   acceleration = accelerometer.get_z()
   radio.send(str(acceleration))
   acceleration = float(acceleration)

   if acceleration > 2 * incoming or acceleration < .5 * incoming:
       display.show(blink)
       microbit.sleep(150)
       display.clear()
       microbit.sleep(150)

错误发生在这一行:

if acceleration > 2 * incoming or acceleration < .5 * incoming:

Answer 1

试试这个:

from microbit import *
import radio

radio.on()

blink = Image("99999:"
              "99999:"
              "99999:"
              "99999:"
              "99999")


radio.send("power on")

while True:
   incoming = radio.receive()
   if incoming is not None:
      incoming = float(incoming)

      sleep(500 - running_time() % 500)
      acceleration = accelerometer.get_z()
      radio.send(str(acceleration))
      acceleration = float(acceleration)

      if acceleration > 2 * incoming or acceleration < .5 * incoming:
          display.show(blink)
          microbit.sleep(150)
          display.clear()
          microbit.sleep(150)

基本原理:您的代码(如发布的)执行第一个 if 来检查 incoming 是否为 None。但是，您在之前的缩进级别上有以下代码块，因此，当 incoming 为 None 时，这些代码块也会执行。