TypeError: *: 'function' and 'int' BMI Calculator 不支持的操作数类型

Question

def GetWeight():
GetWeight = 0.0   
Weight = float(input("How much do you weigh in pounds?\n "))
def GetHeight():
Heightinches = 0.0
Heightinches = input("Enter your height in inches: ")

def Calculate():
BMI = eval (GetWeight * 703 / (GetHeight * GetHeight))
print ("Your BMI is", BMI)
main()

程序一直运行到出现错误的计算模块：

TypeError: unsupported operand type(s) for *: 'function' and 'int'

根据您的建议，代码现在如下所示：

def GetWeight():
GetWeight = 0.0   
Weight = float(input("How much do you weigh in pounds?\n "))

def GetHeight():
Heightinches = 0.0
Heightinches = input("Enter your height in inches:\n ")

def Calculate():
BMI = eval (GetWeight() * 703 / (GetHeight() * GetHeight()))
print("Your BMI is", BMI)
main()

我已经修改了代码，但是现在程序卡在一个连续的问答循环中，并且计算模块永远不会启动。

def GetWeight():
GetWeight = 0.0   
Weight = float(input("How much do you weigh in pounds?\n "))
return GetWeight
def GetHeight():
Heightinches = 0.0
Heightinches = input("Enter your height in inches:\n ")
return GetHeight
def Calculate():
BMI = eval (GetWeight() * 703 / (GetHeight() * GetHeight()))
print("Your BMI is", BMI)
main()

Answer 1

为了调用您的函数，请使用()，如下所示：

GetWeight() , GetHeight() ...

就像现在一样，您正试图将一个 函数 与一个整数相乘。

Read more about functions in Python.

Answer 2

GetWeight * 703

由于你没有在函数名后面加上括号，所以它使用的是函数对象本身的值，而不是调用函数的结果。

在函数名后加括号：

GetWeight() * 703

另外，您的 GetWeight 和 GetHeight 函数没有返回任何值；你需要解决这个问题。

Answer 3

编辑

您应该调用函数，查看Calculate 的更正代码

def GetWeight():
  weight = float(input("How much do you weigh in pounds?\n "))
  return weight

def GetHeight():
  height = input("Enter your height in inches:\n ")
  return height

def Calculate():
  height = GetHeight()
  weight = GetWeight()
  BMI = (weight * 703) / (height * height)
  print ("Your BMI is", BMI)