my parser.py isn't imported

John Machin sjmachin at lexicon.net
Tue Aug 28 00:06:33 CEST 2007


On Aug 27, 7:33 pm, Lawrence D'Oliveiro <l... at geek-
central.gen.new_zealand> wrote:
> In message <87ps19q5fs.... at wilson.homeunix.com>, Torsten Bronger wrote:
>
> > So I'd like to know a means to tell *explicitly* what I want to
> > import.  Maybe I could use the imp module but that's ugly.
>
> That seems to be the standard Python-provided way to explicitly import the
> file you want from the place you want.
>
> > I mean, there are hundreds of modules on my harddisk, so trying to avoid
> > nameclashs should not be the solution...
>
> That is what namespace qualifiers are for, e.g.
>
>     import my_custom_stuff.parser
>
> versus
>
>     import parser
>
> > John Machin writes:
>
> >> 2. Failure to RTFabulousM:
> >> """
> >> Details of the module searching and loading process are
> >> implementation and platform specific. It generally involves
> >> searching for a ``built- in'' module with the given name and then
> >> searching a list of locations given as sys.path.
> >> """
>
> > ... the whole systems seems largely arbitrary, which I don't
> > believe.  ;-)
>
> The documentation <http://docs.python.org/lib/module-sys.html> says quite
> clearly that the search order is controlled by sys.path. So why not
> manipulate that to get the effect you want?

Short answer: it doesn't work. The documentation that I quoted
previously says that if a module is is built in, it will be selected,
*before* sys.path is examined. The OP's original message stated quite
clearly that the directory containing his own parser.py is at the
front of sys.path.

>
> > "parser" is built-in on Windows but not on Linux.
>
> It is standard on all platforms
> <http://docs.python.org/lib/module-parser.html>.

"standard" != "builtin"





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