python - / 不支持的操作数类型：“str”和“str”

Question

print("Please enter your Weight")
weight = input(">")
print("Please enter your height")
height = input(">")
bmi = weight/height
if int(bmi) <= 18:
print("you are currently under weight")
elif int(bmi)>=24:
print("you are normal weight")
else:
print("you are over weight")

追溯

File "C:\Users\reazonsraj\Desktop\123.py", line 6, in <module>
bmi = weight/height
TypeError: unsupported operand type(s) for /: 'str' and 'str'

Answer 1

def enter_params(name):
    print("Please enter your {}".format(name))
    try:
        return int(input(">"))
    except ValueError:
        raise TypeError("Enter valid {}".format(name)) 
height = enter_params('height')
weight = enter_params('weight')
bmi = int(weight/height)
if bmi <= 18:
    print("you are currently under weight")
elif bmi >= 24:
    print("you are normal weight")
else:
    print("you are over weight")

Answer 2

print("Please enter your Weight")
weight = float(input())
print("Please enter your height")
height = float(input())
bmi = weight/height
if (bmi) <= 18:
print("you are currently under weight")
elif (bmi)>=24:
print("you are normal weight")
else:
print("you are over weight")

Answer 3

输入数据时将其保存为字符串。您需要做的是将其转换为 int。

print("Please enter your Weight")
weight = int(input(">"))
print("Please enter your height")
height = int(input(">"))
bmi = weight/height
if int(bmi) <= 18:
print("you are currently under weight")
elif int(bmi)>=24:
print("you are normal weight")
else:
print("you are over weight")

这将解决一个问题，但并不能解决所有问题。如果您要输入十进制数字，那么您将收到一个ValueError整数int()交易。要解决此问题，您将需要使用float()而不是 int。

print("Please enter your Weight")
weight = float(input(">"))
print("Please enter your height")
height = float(input(">"))
bmi = weight/height