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Groups > comp.lang.python > #9598

Re: Type checking versus polymorphism (was: list(), tuple() should not place at "Built-in functions" in documentation)

References <cf0e04cc-a065-4fc4-ab25-777adadafb81@glegroupsg2000goo.googlegroups.com> <874o2nb00n.fsf@benfinney.id.au> <4e20fbc9$0$29979$c3e8da3$5496439d@news.astraweb.com>
Date 2011-07-15 22:02 -0700
Subject Re: Type checking versus polymorphism (was: list(), tuple() should not place at "Built-in functions" in documentation)
From Chris Rebert <clp2@rebertia.com>
Newsgroups comp.lang.python
Message-ID <mailman.1099.1310792526.1164.python-list@python.org> (permalink)

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On Fri, Jul 15, 2011 at 7:47 PM, Steven D'Aprano
<steve+comp.lang.python@pearwood.info> wrote:
<snip>
> Assertions are for testing internal program logic, not for validation.
>
> (I don't even like using assert for testing. How do you test your code with
> assertions turned off if you use assert for testing?)

I would think that would only matter if either the asserted
expressions caused side-effects or there was nontrivial logic in the
AssertionError handler, which would indicate a rather screwy codebase
and point to a possible PEBKAC issue that testing cannot hope to
remedy.

Cheers,
Chris
--
http://rebertia.com

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Thread

Re: list(),tuple() should not place at "Built-in functions" in documentation Inside <fancheyujian@gmail.com> - 2011-07-15 12:53 -0700
  Type checking versus polymorphism (was: list(),tuple() should not place at "Built-in functions" in documentation) Ben Finney <ben+python@benfinney.id.au> - 2011-07-16 09:24 +1000
    Re: Type checking versus polymorphism (was: list(),tuple() should not place at "Built-in functions" in documentation) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-07-16 12:47 +1000
      Re: Type checking versus polymorphism (was: list(), tuple() should not place at "Built-in functions" in documentation) Chris Rebert <clp2@rebertia.com> - 2011-07-15 22:02 -0700
        Re: Type checking versus polymorphism (was: list(), tuple() should not place at "Built-in functions" in documentation) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-07-16 16:33 +1000
  Re: list(), tuple() should not place at "Built-in functions" in documentation Chris Angelico <rosuav@gmail.com> - 2011-07-16 09:27 +1000
    Liskov substitution principle (was: list(), tuple() should not place at "Built-in functions" in documentation) Ben Finney <ben+python@benfinney.id.au> - 2011-07-16 10:04 +1000
      Re: Liskov substitution principle (was: list(), tuple() should not place at "Built-in functions" in documentation) Chris Angelico <rosuav@gmail.com> - 2011-07-16 10:17 +1000
        Re: Liskov substitution principle Ben Finney <ben+python@benfinney.id.au> - 2011-07-16 11:47 +1000
  Re: list(),tuple() should not place at "Built-in functions" in documentation Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-07-16 14:06 +1000

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