Python：根据变量的值调用类

Question

Essentially what I want this code to do, is replace (systemType).clear() with either unix.clear or windows.clear . Is this even possible?

if(platform.system()=="Windows"):
    systemType="windows"
else:
    systemType="unix"

class unix:
    def clear():
        os.system('clear')

class windows:
    def clear():
        os.system('cls')


print("Detecing systemType")
time.sleep(1)
(systemType).clear()

The error is AttributeError: 'str' object has no attribute 'clear'

Answer 1

If you move the assignment of systemType to after the class definitions, you can assign it the classes themselves rather than their names:

class unix:
    def clear():
        os.system('clear')

class windows:
    def clear():
        os.system('cls')

if platform.system()=="Windows":
    systemType = windows
else:
    systemType = unix

print("Detecing systemType")
time.sleep(1)
systemType.clear()

Answer 2

import os
if os.name == "nt":
     os.system("cls") #windows
else:
     os.system("clear") #unix