Contracts for Python

[Paulo J. Matos]

Hi all,

I am wondering if there is any work on contracts for Python. I could
only find PEP316, however, I am wondering if there is any official
support for it already (tools I mean), and if it is or if it will be
officially supported in any of the next releases of Python.

Cheers,
--
Paulo Jorge Matos - pocmatos at gmail.com
Webpage: http://www.personal.soton.ac.uk/pocm

[alex23]

Re: Contracts for Python

On Oct 29, 3:47 am, "Paulo J. Matos" <pocma...@gmail .comwrote:

I am wondering if there is any work on contracts for Python. I could
only find PEP316, however, I am wondering if there is any official
support for it already (tools I mean), and if it is or if it will be
officially supported in any of the next releases of Python.

It's possible to get a simplistic design-by-contract approach without
external libs by using 'assert'.

Here's a modified example from PEP 316:

class circbuf:

def __init__(self, leng):
"""Construc t an empty circular buffer."""

# pre
assert leng 0, "pre: length not positive"

...

# post
assert self.is_empty() , "post: buffer not empty"
assert len(self.buf) == leng, "post: buffer length incorrect"