如何解决：类型错误：unorderable类型：NoneType（）<浮动（）

Question

我想要得到这个代码在Python的3.x的

这是出现的线部分运行：

#Here we check to make sure horizon (19) and ovveride (16) digital pins aren't on 
#print("GPIO 16 (ovveride) is " + str(GPIO.input(16))) 
#print("GPIO 19 (horizon) is " + str(GPIO.input(19))) 
#print(GPIO.input(19)) 
if (GPIO.input(16) == False) and (GPIO.input(19) == False): #check to see if the passive mode switch is on 
# GPIO 16 is for override and GPIO 19 is for horizon mode 

#In this section we rotate as needed 
    starttime = datetime.datetime.utcnow() 
    if (getcurheading() > getsolarheading()) and (getsolarangle() > 2) and (getcurheading() != 999): 
     while (getcurheading() > (getsolarheading() + hmargin)) and (starttime + datetime.timedelta(seconds=pan_time_limit) > datetime.datetime.utcnow()): 
      if debug == True: 
       print("1: Moving " + str(getcurheading()) + " to " + str(getsolarheading())) 
      motor2neg() 
     motors.setSpeeds(0, 0) 

starttime = datetime.datetime.utcnow() 
if (getcurheading() < getsolarheading()) and (getsolarangle() > 2) and (getcurheading() != 999): 
    while (getcurheading() < (getsolarheading() - hmargin)) and (starttime + datetime.timedelta(seconds=pan_time_limit) > datetime.datetime.utcnow()): 
     if debug == True: 
      print("2: Moving " + str(getcurheading()) + " to " + str(getsolarheading())) 
     motor2pos() 
    motors.setSpeeds(0, 0) 

starttime = datetime.datetime.utcnow() 
if (getcurheading() > tomorrow_static) and (getsolarangle()<0) and (getcurheading() != 999): 
    if (getcurheading() - tomorrow_static) > sleep_tolerance: 
     while (getcurheading() > (tomorrow_static + hmargin)) and (starttime + datetime.timedelta(seconds=pan_time_limit) > datetime.datetime.utcnow()): 

其中产生的错误是：

Traceback (most recent call last): 
    File "solarrobot7-core.py", line 261, in <module> 
    if (getcurheading() < getsolarheading()) and (getsolarangle() > 2) and (getcurheading() != 999): 
TypeError: unorderable types: NoneType() < float() 

这是Unicode字符串与字节另一种情况？

下面是我认为是curheading的定义。

#Translate the IMU from magnetic north to true north since the calcs use true north 
def getcurheading(): 
# The escape character for # is \x23 in hex 
    serialport.write(b"\x23o0 \x23f") 
    headresponse = serialport.readline() 
# print(headresponse) 
    words = headresponse.split(",") 
    if len(words) > 2: 
     try: 
      curheading = (float(words[0])) + 180 
      if curheading + Declination > 360: curheading = curheading - 360 + Declination 
      else: curheading = curheading + Declination 
     except: 
      curheading = 999 
# print(curheading) 
    return curheading 

感谢您指出我没有包含定义j。

Answer 1

if (getcurheading() < getsolarheading()) and (getsolarangle() > 2) and (getcurheading() != 999): 
TypeError: unorderable types: NoneType() < float() 

这个错误意味着你的函数调用getcurheading回报None和功能getsolarheading返回float这就是为什么这些值进行比较是不适用

所以，我建议你去调查getcurheading功能，当它返回时认为None以及为什么。或与我们分享这个功能

更新：

，我可以从函数的定义看，你写一个空间分隔的文件，并用逗号分隔符读书，这就是为什么你有少比words列表2项，作为结果，curheading变量没有定义，函数返回None你有什么问题的根源

，如果你有类似的东西在你的文件：#o0 #f

words = headresponse.split(",") 

点

的话会等于["#o0 #f'] ，你永远不会这个循环里面：

if len(words) > 2: 

解决您的问题，您可以更改此行。替换此：

words = headresponse.split(",") 

与此：

words = headresponse.split(" ")