I think I found a mistake in the official language reference documentation -- or I am missing somethig???
Reading the section "6.11. The import statement" http://docs.python.org/py3k/reference/simple_stmts.html#the-import-statement I found: """ Import statements are executed in two steps: (1) find a module, and initialize it if necessary; (2) define a name or names in the local namespace (of the scope where the import statement occurs). (...) The first form (without from) repeats these steps for each identifier in the list. The form with from performs step (1) once, and then performs step (2) repeatedly. """ In the last sentence, isn't it the opposite? With the "from" form it would find/initialize all the modules and define just the name after "from". Or am I missing something? -- http://mail.python.org/mailman/listinfo/python-list
Re: I think I found a mistake in the official language reference documentation -- or I am missing somethig???
On Apr 27, 6:21 pm, Ken Watford wrote:
> On Wed, Apr 27, 2011 at 4:02 PM, Igor Soares wrote:
> > Reading the section "6.11. The import statement"
> >http://docs.python.org/py3k/reference/simple_stmts.html#the-import-st...
>
> > I found:
> > """
> > Import statements are executed in two steps: (1) find a module, and
> > initialize it if necessary; (2) define a name or names in the local
> > namespace (of the scope where the import statement occurs).
> > (...)
> > The first form (without from) repeats these steps for each identifier
> > in the list. The form with from performs step (1) once, and then
> > performs step (2) repeatedly.
> > """
> > In the last sentence, isn't it the opposite?
> > With the "from" form it would find/initialize all the modules and
> > define just the name after "from".
> > Or am I missing something?
>
> Judging only by what you've quoted, the forms would be:
>
> 1) import os, sys, glob
> 2) from os.path import exists, split, join
>
> In the first form, one or more modules come after the 'import'. In the
> second form, a single module comes after the 'from', and then multiple
> names from within that module come after the 'import'. Looks fine to
> me.
Ooops... yeah, i got somthing wrong
Well, I've got a strange example running in windows, IDLE, and python
2.7.1
running this:
"import pkg1.pkg2.mod1"
defined all theese names ("pkg1", "pkg2" and "mod1") in the local
scope
But now, at home, running python 2.6.6 with Debian (without IDLE) it
doesn't work
I'll try again tomorow (maybe its IDLE)
Thanks
--
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Re: I think I found a mistake in the official language reference documentation -- or I am missing somethig???
On 27 abr, 21:29, MRAB wrote: > On 27/04/2011 21:02, Igor Soares wrote: > > > > > > > > > > > Reading the section "6.11. The import statement" > >http://docs.python.org/py3k/reference/simple_stmts.html#the-import-st... > > > I found: > > """ > > Import statements are executed in two steps: (1) find a module, and > > initialize it if necessary; (2) define a name or names in the local > > namespace (of the scope where the import statement occurs). > > (...) > > The first form (without from) repeats these steps for each identifier > > in the list. The form with from performs step (1) once, and then > > performs step (2) repeatedly. > > """ > > In the last sentence, isn't it the opposite? > > With the "from" form it would find/initialize all the modules and > > define just the name after "from". > > Or am I missing something? > > The "from" form is like: > > from monty import spam, eggs > > The steps are: > > 1. find module "monty", and initialize it if necessary > > 2. define name "spam" in the local namespace > > 3. define name "eggs" in the local namespace > > Also note that the name "monty" itself never enters the local namespace. My mistake... I got confused with wrong code in IDLE... I also didn't understand that section ( 6.11 ) at first Thank you guys for the help -- http://mail.python.org/mailman/listinfo/python-list
