any chance for contracts and invariants in Python?

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Subject	any chance for contracts and invariants in Python?
From	mrkafk@gmail.com
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This PEP seems to be gathering dust:

http://www.python.org/dev/peps/pep-0316/

I was thinking the other day, would contracts and invariants not be better than unit tests? That is, they could do what unit tests do and more, bc they run at execution time and not just at development time?

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any chance for contracts and invariants in Python? mrkafk@gmail.com - 2013-02-14 03:42 -0800
  Re: any chance for contracts and invariants in Python? Philipp Hagemeister <phihag@phihag.de> - 2013-02-14 18:03 +0100
  Re: any chance for contracts and invariants in Python? Ian Kelly <ian.g.kelly@gmail.com> - 2013-02-14 11:05 -0700
  Re: any chance for contracts and invariants in Python? MRAB <python@mrabarnett.plus.com> - 2013-02-14 18:18 +0000
  Re: any chance for contracts and invariants in Python? Ethan Furman <ethan@stoneleaf.us> - 2013-02-14 10:33 -0800
  Re: any chance for contracts and invariants in Python? Mark Janssen <dreamingforward@gmail.com> - 2013-02-14 18:33 -0800

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