Created
February 23, 2013 13:36
-
-
Save txels/5019775 to your computer and use it in GitHub Desktop.
This is a simple demo of using Zope interfaces to verify compliance without forcing users to explicitly declare them.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #!/usr/bin/env python | |
| from zope.interface import Interface, classImplements, verify | |
| class IGreet(Interface): | |
| """ | |
| Be friendly and greet people | |
| """ | |
| def hello(whom): | |
| """ | |
| When they come | |
| """ | |
| def bye(whom, until): | |
| """ | |
| When they go | |
| """ | |
| class Impolite(object): | |
| def dontcare(self): | |
| print("I don't care") | |
| class Incomplete(object): | |
| def hello(self, whom): | |
| print('Hi {0}'.format(whom)) | |
| class Impersonal(object): | |
| def hello(self): | |
| print('Hi someone') | |
| def bye(self): | |
| print('Bye someone') | |
| class Friendly(object): | |
| def hello(self, whom): | |
| print('Hi {0}'.format(whom)) | |
| def bye(self, whom, until): | |
| print('Bye {0}, see you next {1}!'.format(whom, until)) | |
| if __name__ == '__main__': | |
| for cls in (Impolite, Incomplete, Impersonal, Friendly): | |
| try: | |
| classImplements(cls, IGreet) | |
| verify.verifyClass(IGreet, cls) | |
| except Exception as e: | |
| print("{0} fails to implement IGreet, reason:\n{1}" | |
| .format(cls.__name__, e)) | |
| else: | |
| print("{0} implements IGreet fully!" | |
| .format(cls.__name__)) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment