[mod_python] Re: mod_python and module importing

______________________________________________________________
> Od: grahamd at dscpl.com.au
> Komu:  ".: smilelover :." <smilelover at centrum.cz>
> CC:  <mod_python at modpython.org>
> Datum: 11.05.2006 12:17
> Předmět: Re: [mod_python] Re: mod_python and module importing
>
>  
> On 11/05/2006, at 6:15 PM, .: smilelover :. wrote:
> 
> > ______________________________________________________________
> >> Od: smilelover at centrum.cz
> >> Komu:  <mod_python at modpython.org>
> >> CC:
> >> Datum: 10.05.2006 11:04
> >> Předmět: mod_python and module importing
> >>
> >>  Hi guys,
> >> I have a simple python web running on mod_python, but I have serious
> >> troubles with importing my own modules located in the project  >>
> directory.
> >>
> >> I have index.py and a directory called "lib", which contains a  >> file
> called
> >> MyWebTools.py.
> >> I have added the path to sys.path via:
> >>
> >> PythonPath "sys.path+[os.getcwd()+'/lib']"
> >>
> >> in .htaccess.
> >>
> >> But when I use "import MyWebTools", I get an error message saying  >>
> no such
> >> module exists a and it is the same when I place MyWebTools.py  >>
> directly
> >> into the project dir.
> >>
> >> The most weird I experienced is, that sometimes it works,  >> somwtimes
> not.
> >> And sometimes it works partialy - the module is imported, but  >>
> Python says
> >> that instances of a class contained in MyWebTools do not have certain
> >> attributes (even though they DO have them and when I declare the  >>
> class in
> >> index.py, everything works fine).
> >> But most of the time it says the module is not there.
> >>
> >> So how can I safely import a module?
> >>
> >>
> >
> > OK, one of the problems was using os.getcwd() in PythonPath  >
> directive. It returns / and it returns / even if called directly in  > the
> script (index.py). It is not necessary to use it at all  > (mod_python adds
> the base script dir in PythonPath when index.py is  > called, doesn't it?).
> > When I added __init__.py with appropriate content to the lib dir,  > it
> worked.
> 
> Add an __init__.py file into the "lib" directory doesn't make a great 
> deal of sense
> unless what you were actually doing was:
> 
>    from lib import MyWebTools
> 
> That is, "lib" was really acting like a package. If not, I don't see  how
> it would make
> any difference.
> 
> Graham</mod_python at modpython.org>

Yes, I want it to be a package and that's why I added __init__.py and use the "from ..." stuff. When I change the import command to

    import MyWebTools

it works only sometimes (when reloading the page for several times), it's strange.
I think it shouldn't work at all, because there is no standalone module called MyWebTools in the base directory and no package called MyWebTools (just the lib pack).

Dan