如何修复“ValueError：无法将字符串转换为浮点数：'East'”（Python）

Question

When the user enters "East" I want the output to be -1 not "East"

East = -1

Xdirectioninput = float(input("Is the player South or East: "))
Xdirectioninput = (Xdirectioninput)

print (Xdirectioninput)

Answer 1

That will only work in Python 2. It works because in Python 2, what the user types in response to input() is evaluated as a Python expression.

But you can't do that in Python 3. One way to do it is to set up a dictionary with directions:

directions = {"East": -1.0, "South": -2.0}
Xdirectioninput = directions[input("Is the player South or East: ")]

Answer 2

I think conditional statement would be good solution. You could make a code as follows:

Xdirectioninput = input("Is the player South or East: ")
if Xdirectioninput == 'East':
    Xdirection = -1
print(Xdirection)