ive no idea what __main__.py is either ? where's the SQLAlchemy exceptions
here ? (keeping in mind i havent yet gone through all the steps to download a
file...untar it...figure out what you're trying to do...)
On Oct 3, 2011, at 6:11 AM, Chris Withers wrote:
> Hi All,
>
> The attached package gives that smallest possible example of problems I'm
> hitting with some SQLAlchemy declarative classes.
>
> In short, I want to be able to do:
>
> python -m pack.module and have if the __name__=='__main__' block spit out the
> SQL to create the tables necessary for the modules in that class...
>
> So, using the attached package to demonstrate, the first problem I get is:
>
> cwithers@cwlin:~> python -m pack.module
> Traceback (most recent call last):
> File "/usr/lib64/python2.6/runpy.py", line 121, in _run_module_as_main
> "__main__", fname, loader, pkg_name)
> File "/usr/lib64/python2.6/runpy.py", line 34, in _run_code
> exec code in run_globals
> File "/home/cwithers/pack/module.py", line 3, in <module>
> class MyClass(object):
> File "pack/__init__.py", line 7, in __init__
> raise Exception('%r registered twice' % self.__name__)
> Exception: 'MyClass' registered twice
>
> Looks like I have a pack.module.MyClass and a __main__.MyClass, which feels
> like a bug to me...
>
> Ho hum, lets try something different:
>
> cwithers@cwlin:~> python pack/module.py
> Traceback (most recent call last):
> File "pack/module.py", line 1, in <module>
> from pack import MyMeta
> ImportError: No module named pack
>
> Meh, okay, so only the path containing the script being run ends up on
> PYTHONPATH, okay, so:
>
> cwithers@cwlin:~> PYTHONPATH=. python pack/module.py
> Traceback (most recent call last):
> File "pack/module.py", line 3, in <module>
> class MyClass(object):
> File "pack/__init__.py", line 7, in __init__
> raise Exception('%r registered twice' % self.__name__)
> Exception: 'MyClass' registered twice
>
> ...back to square one :-(
>
> cwithers@cwlin:~> python -m pack
> /usr/bin/python: pack is a package and cannot be directly executed
>
> That's annoying, why isn't pack/__init__.py's __name__=='__main__' block
> executed?
>
> cwithers@cwlin:~> python pack
> /usr/bin/python: can't find '__main__.py' in 'pack'
>
> Wha? First I've ever heard of __main__.py... where's that documented?
> Anyway:
>
> cwithers@cwlin:~> python pack/__init__.py
> Traceback (most recent call last):
> File "pack/__init__.py", line 10, in <module>
> from pack.module import MyClass
> ImportError: No module named pack.module
>
> Oh, right, we're back here..., so lets try:
>
> cwithers@cwlin:~> PYTHONPATH=. python pack/__init__.py
> {'MyClass': <class 'pack.module.MyClass'>}
> {}
>
> wtf? why aren't these the same registry object?!
>
> Any help appreciated...
>
> Chris
>
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> <pack.tgz>
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