Thank
you! As long as I manually set projectDir to some valid path all that
works for me! However, you specificaly said that absolute paths should be
avoided, and I agree. So, how should projectDir be getting set without
doing it overtly? For the moment this works, so I'm off high-center, but I
need to understand the more general coase for the longer
haul.
--Hank
On 1/18/06, Hank Freeman <[EMAIL PROTECTED]>
wrote:
> I am working on learning MiddleKit, and having a great
time. Things have
> gone well until I try to actually build a
Store from my model. After
> creating a simple model,
generating it, creating the database and it's
> objects, and loading my
sample data all successfully, I've stumbled. When I
> try to
do store.readModelFileNamed(_filename) I get "ModelError: (<path to
>
my model.mkmodel>', "Could not import module for class '<First class in
my
> model>' due to 'No module named Middle'. If you added
this class recently,
> you need to re-generate your
model.')
>
> I have a Settings.config file that contains:
>
{
> 'Package':
'Middle',
> 'SQLLOG': {'File': 'mk-sql.log'
},
> 'Database': 'MyDbNameHere'
>
}
> and my "Middle" directory does have (an empty) __init__.py file to
identify
> it as a package.
>
> I suspect I'm making a
common noob oversite here, but (admitting to being a
> newbie) I cannot
see it. Any advice on common pitfalls I might be hitting
>
here? Thanks in advance!
The directory containing your
Middle directory needs to be in the
python path which is stored in sys.path
at runtime, and augmented by
the environment variable PYTHONPATH when
Python starts.
I like to make my code impervious to its environment
when possible, so
my personal pref is to enhance sys.path in my Python
code. Also:
- I also like to make my code impervious to what directory
it's run
in, so I don't use absolute paths.
- sys.path[0] is often a
blank string or the path of the main python
program. Whatever the case, I
never pre-empt it.
- My program is usually "next door" to the Middle
directory in another
directory like "bin" or "WebApp".
So given all
that, a command line tool I write that uses Middle might say:
import
os, sys
progPath = os.path.join(os.getcwd(), sys.argv[0])
progDir =
os.path.dirname(progPath)
projectDir =
os.path.dirname(projectDir)
assert os.path.exists(projectDir),
projectDir
sys.path.insert(1, projectDir)
# now test it:
import
Middle
For a WebKit app, you'd do this fixup during context
initialization.
Or you could just set the PYTHONPATH environment
variable and not
write any Python code.
Btw any time you have
problems importing a module, you can "print
sys.path" to help you
troubleshoot it, although I find that output
hard to read and do this
instead:
for p in sys.path:
print
repr(p)
HTH,
Chuck
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