python - 一行，三个变量

Question

我在这里试图用 python 制作一个简单的计算器，我想知道是否可以在命令运行时将前 3 行合并为一行。我的意思是；我不必按 Enter 键来键入下一个数字/运算符，而是按空格键(在输入部分)。

while True:
    import operator

    num1 = int(input("Whats the first number:"))
    oper = input("Which operator would you like to use: (+,-,/,*,**,^)  :")
    num2 = int(input("Whats the second number:"))


    if oper == "+":
        x = operator.add

    elif oper == "-":
        x = operator.sub

    elif oper == "*":
        x = operator.mul

    elif oper == "/":
        x = operator.__truediv__
    elif oper == "**":
        x = operator.pow
    elif oper == "^":
        x = operator.xor

    else:
        print("invalid input")

    print(num1,oper,num2,"=",x(num1,num2))

Answer 1

可以使用Python字符串的split方法来完成。请注意，此代码取决于输入的三个对象，以空格分隔。如果输入了更多或更少或忘记了空格，或者“数字”实际上不是整数，则会出现错误。

print("Enter a number, a space, an operator, a space, and another number.")
num1str, oper, num2str = input().split()
num1, num2 = int(num1str), int(num2str)