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Groups > comp.lang.python > #26731

Re: I thought I understood how import worked...

From Terry Reedy <tjreedy@udel.edu>
Subject Re: I thought I understood how import worked...
Date 2012-08-07 13:15 -0400
References <roy-B56619.09182407082012@news.panix.com> <87txweiz7f.fsf@benfinney.id.au> <be5f6e25-5d7c-4e10-baa3-9aef422812a1@googlegroups.com>
Newsgroups comp.lang.python
Message-ID <mailman.3065.1344359780.4697.python-list@python.org> (permalink)

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On 8/7/2012 11:32 AM, Roy Smith wrote:
> On Tuesday, August 7, 2012 9:55:16 AM UTC-4, Ben Finney wrote:
>
>> The tutorial is misleading on this. It it says plainly:
>>
>> A module can contain executable statements as well as function
>> definitions. […] They are executed only the *first* time the
>> module is imported somewhere.

The last sentence should be more like "They are executed only the
*first* time the module is imported anywhere with a particular name.
(One should avoid importing a module under different names.)

>> <URL:http://docs.python.org/tutorial/modules.html>

>> [1]	In fact function definitions are also ‘statements’ that are
>> ‘executed’; the execution of a module-level function enters the
>> function name in the module’s global symbol table.
>
> I think what it's supposed to say is "... the execution of a
> module-level def statement ..."

right

>> Care to file a documentation bug <URL:http://bugs.python.org/>
>> describing this?
>
> Sure, once I understand how it's really supposed to work :-)

You don't need a final solution to file. Anyway, I think the change 
above might be enough.

-- 
Terry Jan Reedy

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Thread

I thought I understood how import worked... Roy Smith <roy@panix.com> - 2012-08-07 09:18 -0400
  Re: I thought I understood how import worked... Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-07 13:52 +0000
    Re: I thought I understood how import worked... Roy Smith <roy@panix.com> - 2012-08-07 08:25 -0700
      Re: I thought I understood how import worked... Paul Rubin <no.email@nospam.invalid> - 2012-08-07 08:53 -0700
      Re: I thought I understood how import worked... Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-07 17:54 +0000
    Re: I thought I understood how import worked... Cameron Simpson <cs@zip.com.au> - 2012-08-08 08:47 +1000
      Re: I thought I understood how import worked... Roy Smith <roy@panix.com> - 2012-08-07 19:05 -0400
      Re: I thought I understood how import worked... Ben Finney <ben+python@benfinney.id.au> - 2012-08-08 14:14 +1000
        Re: I thought I understood how import worked... Laszlo Nagy <gandalf@shopzeus.com> - 2012-08-08 08:40 +0200
        Re: I thought I understood how import worked... Roy Smith <roy@panix.com> - 2012-08-08 09:12 -0400
        Re: I thought I understood how import worked... Cameron Simpson <cs@zip.com.au> - 2012-08-09 15:52 +1000
  Re: I thought I understood how import worked... Ben Finney <ben+python@benfinney.id.au> - 2012-08-07 23:55 +1000
    Re: I thought I understood how import worked... Laszlo Nagy <gandalf@shopzeus.com> - 2012-08-07 16:14 +0200
    Re: I thought I understood how import worked... Roy Smith <roy@panix.com> - 2012-08-07 08:32 -0700
      Re: I thought I understood how import worked... Terry Reedy <tjreedy@udel.edu> - 2012-08-07 13:15 -0400
  Re: I thought I understood how import worked... Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-07 15:10 +0100
  Re: I thought I understood how import worked... Terry Reedy <tjreedy@udel.edu> - 2012-08-07 12:49 -0400
  Re: I thought I understood how import worked... Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-07 18:44 +0100
  Re: I thought I understood how import worked... Jean-Michel Pichavant <jeanmichel@sequans.com> - 2012-08-08 10:47 +0200

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