没有收到我应该收到的输出

如何解决没有收到我应该收到的输出

所以我试图制作一个重量转换器应用程序。它首先询问用户他们的体重，然后询问是磅还是公斤，然后将其转换为其他单位。例如，如果有人以公斤为单位输入他们的体重，它将以磅为单位进行转换。但问题是，每当我以磅为单位输入时，它应该将其转换为公斤，但事实并非如此，并将其“转换”为磅，即使是以磅为单位的。

weight = int(input("Enter your weight: "))
user_choice = input ("(L)bs or (K)g: ")

if user_choice == "K" or "k":
    converted = int(weight) * 2.2046
    print (f"Your weight in pounds is {converted} lbs")
elif user_choice == "L" or "l":
    converted = int(weight) / 2.2046
    print (f"Your weight in kilograms is {converted} kg")
else:
    print ("Please enter a valid option.")

我是 Python 的初学者，所以任何帮助将不胜感激。

解决方法

使用 user_choice=="k" 或 user_choice=="K"：

    weight = int(input("Enter your weight: "))
    user_choice = input ("(L)bs or (K)g: ")
    
    if (user_choice == "K" or user_choice=="k"):
        converted = int(weight) * 2.2046
        print (f"Your weight in pounds is {converted} lbs")
    elif(user_choice == "L" or user_choice=="l"):
        converted = (int(weight) / 2.2046)
        print (f"Your weight in kilograms is {converted} kg")
    else:
        print ("Please enter a valid option.")

,

您可以通过稍微修改 if-elif 条件使其工作

weight = int(input("Enter your weight: "))
user_choice = input ("(L)bs or (K)g: ")

if user_choice in ('k','K'):
    converted = int(weight) * 2.2046
    print (f"Your weight in pounds is {converted} lbs")
elif user_choice in ('l','L'):
    converted = int(weight) / 2.2046
    print (f"Your weight in kilograms is {converted} kg")
else:
    print ("Please enter a valid option.")