返回函数值为float Python 3.6.1

Question

我收到以下错误，似乎无法弄清楚如何解决。遵循逻辑，我将3个函数和所有3个返回值作为float调用，然后对存储的返回值执行一些数学运算并将其打印为float。那么哪里出了问题？余为A侧输入4和5侧B.

错误消息：

输入侧A的长度：4.0 输入侧B的长度：5.0

Traceback (most recent call last): 
    File "python", line 26, in <module> 
    File "python", line 9, in main 
    File "python", line 24, in calculateHypotenuse 
TypeError: unsupported operand type(s) for ^: 'float' and 'float' 

---

import math 

def main(): 
    #Call get length functions to get lengths. 
    lengthAce = getLengthA() 
    lengthBee = getLengthB() 

    #Calculate the length of the hypotenuse 
    lengthHypotenuse = calculateHypotenuse(float(lengthAce),float(lengthBee)) 

    #Display length of C (hypotenuse) 
    print() 
    print("The length of side C 'the hypotenuse' is {}".format(lengthHypotenuse)) 

#The getLengthA function prompts for and returns length of side A 
def getLengthA(): 
    return float(input("Enter the length of side A: ")) 

#The getLengthA function prompts for and returns length of side B 
def getLengthB(): 
    return float(input("Enter the length of side B: ")) 

def calculateHypotenuse(a,b): 
    return math.sqrt(a^2 + b^2) 

main() 

print() 
print('End of program!') 

Answer 1

在Python ^是bitwise XOR operator，不是电源操作：

^运算得到的按位异或它的参数（异或），必须是intege

您需要使用**代替，这是幂运算符：

def calculateHypotenuse(a,b): 
    return math.sqrt(a**2 + b**2)