Re: None in string => TypeError?

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Subject	Re: None in string => TypeError?
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From	Roy Smith <roy@panix.com>
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Date	Mon, 9 Jun 2014 12:53:59 -0400
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On Jun 9, 2014, at 11:57 AM, Paul Sokolovsky wrote:

> This is very Pythonic, Python is strictly typed language. There's no
> way None could possibly be "inside" a string, so if you're trying to
> look for it there, you're doing something wrong, and told so.

Well, the code we've got is:

           hourly_data = [(t if status in 'CSRP' else None) for (t, status) in hours]

where status can be None.  I don't think I'm doing anything wrong.  I wrote exactly what I mean :-)  We've changed it to:

          hourly_data = [(t if (status and status in 'CSRP') else None) for (t, status) in hours]

but that's pretty ugly.  In retrospect, I suspect:

          hourly_data = [(t if status in set('CSRP') else None) for (t, status) in hours]

is a little cleaner.

---
Roy Smith
roy@panix.com

Thread

None in string => TypeError? Roy Smith <roy@panix.com> - 2014-06-09 08:34 -0700
  Re: None in string => TypeError? Ryan Hiebert <ryan@ryanhiebert.com> - 2014-06-09 10:42 -0500
  Re: None in string => TypeError? Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-09 09:50 -0600
  Re: None in string => TypeError? Paul Sokolovsky <pmiscml@gmail.com> - 2014-06-09 18:57 +0300
    Re: None in string => TypeError? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-06-09 16:14 +0000
      Re: None in string => TypeError? Chris Angelico <rosuav@gmail.com> - 2014-06-10 02:31 +1000
  Re: None in string => TypeError? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-06-09 16:07 +0000
  Re: None in string => TypeError? MRAB <python@mrabarnett.plus.com> - 2014-06-09 17:06 +0100
  Re: None in string => TypeError? Shiyao Ma <i@introo.me> - 2014-06-10 00:13 +0800
  Re: None in string => TypeError? Roy Smith <roy@panix.com> - 2014-06-09 12:53 -0400
  Re: None in string => TypeError? Chris Angelico <rosuav@gmail.com> - 2014-06-10 02:59 +1000
  Re: None in string => TypeError? Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-09 11:22 -0600
  Re: None in string => TypeError? Chris Angelico <rosuav@gmail.com> - 2014-06-10 03:40 +1000
  Re: None in string => TypeError? Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-09 11:58 -0600
  Re: None in string => TypeError? Chris Angelico <rosuav@gmail.com> - 2014-06-10 04:02 +1000

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