On Wed, 10 Nov 2010, Greg Lindstrom wrote:
I'm writing my first module that I intend to put under our company's
"site-packages" directory for everyone to use in their programs. The
problem I'm having is that I want to place files in a data directory under
the module directory (under site-packages) and I don't know how to set the
path so I pick up the files. If I use open('./data/myfile') I get the path
of the file importing the module (which could be just about anywhere). I've
tried various combinations using os.path.abspath() and os.path.dirname() but
have the same problem. Is there a way I can use files in the subdirectory
(I really do not want dozens more files in the main directory)?
I'm not sure I follow.
You want to put data, i.e., non-python code, in the import path? That
sounds unusual to me.
You can find the filename from which a module is imported with the
module's __file__ attribute; and then os.path.dirname() can get you the
directory. So if you wanted to address a subdirectory named "data" in the
same directory from which you imported a given module, or a file
"myfile.txt" in that subdirectory, that's possible.
Using the sqlite module as an example on my system:
import sqlite3
sqlite3.__file__
'C:\\Python26\\lib\\sqlite3\\__init__.pyc'
import os
os.path.dirname(sqlite3.__file__)
'C:\\Python26\\lib\\sqlite3'
os.path.join(os.path.dirname(sqlite3.__file__), "data")
'C:\\Python26\\lib\\sqlite3\\data'
os.path.join(os.path.dirname(sqlite3.__file__), "data", "myfile.txt")
'C:\\Python26\\lib\\sqlite3\\data\\myfile.txt'
Is this the kind of thing you're thinking of?
Again, it's highly unusual to put non-code data in the import path; I've
never heard of this being done before, and it makes me shiver in
revulsion. I'm not sure I can articulate exactly what bad effects it will
have, apart from the inherent messiness of it, but I don't like it.
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