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frontend.py
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frontend.py
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from abc import ABCMeta, abstractmethod
class Frontend(metaclass=ABCMeta):
""" This is an interface for a frontend object so that various
frontends can be hooked up."""
def __init__(self):
return
@abstractmethod
def display(self, info):
raise NotImplementedError("This is an interface!")
@abstractmethod
def input(self, prompt):
raise NotImplementedError("This is an interface!")
class ConsoleFrontend(Frontend):
def display(self, info):
print(info)
def input(self, prompt):
return input(prompt + " ")
class LuaFrontend(Frontend):
pass
class SmsFrontend(Frontend):
pass
c = ConsoleFrontend()
try:
l = LuaFrontend()
print("Uh oh. This should throw an error because abstract methods aren't defined.")
except TypeError:
print("Good! Abstract methods work!")
c.display("Hello, world")
c.input("Where are you?")
c.display(c.input("How are you?"))