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Re: How to detect that a function argument is the default one

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On Wed, Dec 10, 2014 at 9:10 AM, Jean-Michel Pichavant <
jeanmichel@sequans.com> wrote:
> If you like one-liners,
>
> def __init__(self, center=(0,0), radius=10, mass=None):
>     self.center = center
>     self.radius = radius
>     self.mass = (mass is None and radius**2) or mass

If mass is None and radius is 0, then self.mass gets set to None. Use the
actual ternary operator instead.

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How to detect that a function argument is the default one "ast" <nomail@invalid.com> - 2014-12-10 16:14 +0100
  Re: How to detect that a function argument is the default one Skip Montanaro <skip.montanaro@gmail.com> - 2014-12-10 09:29 -0600
    Re: How to detect that a function argument is the default one "ast" <nomail@invalid.com> - 2014-12-10 16:45 +0100
    Re: How to detect that a function argument is the default one Marko Rauhamaa <marko@pacujo.net> - 2014-12-10 18:33 +0200
  Re: How to detect that a function argument is the default one Chris Angelico <rosuav@gmail.com> - 2014-12-11 03:16 +1100
    Re: How to detect that a function argument is the default one wxjmfauth@gmail.com - 2014-12-10 12:08 -0800
    Re: How to detect that a function argument is the default one "ast" <nomail@invalid.com> - 2014-12-10 22:17 +0100
      Re: How to detect that a function argument is the default one Ian Kelly <ian.g.kelly@gmail.com> - 2014-12-11 11:03 -0700
      Re: How to detect that a function argument is the default one Ian Kelly <ian.g.kelly@gmail.com> - 2014-12-11 11:07 -0700
  Re: How to detect that a function argument is the default one Ned Batchelder <ned@nedbatchelder.com> - 2014-12-10 11:19 -0500
  Re: How to detect that a function argument is the default one Ian Kelly <ian.g.kelly@gmail.com> - 2014-12-10 09:20 -0700
  Re: How to detect that a function argument is the default one Tony the Tiger <tony@tiger.invalid> - 2014-12-11 19:45 +0000
    Re: How to detect that a function argument is the default one Ben Finney <ben+python@benfinney.id.au> - 2014-12-12 10:03 +1100

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