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Ok, I think whatever I'm doing wrong, it's probably blindingly obvious, but I can't figure it out. I've read and re-read the tutorial section on packages and the only thing I can figure is that this won't work because I'm executing it directly. Here's the directory setup: eulerproject/ __init__.py euler1.py euler2.py ... eulern.py tests/ __init__.py testeulern.py Here are the contents of testeuler12.py (the first test module I've written): import unittest from .. import euler12 class Euler12UnitTests(unittest.TestCase): def testtriangle(self): """ Ensure that the triangle number generator returns the first 10 triangle numbers. """ self.seq = [1,3,6,10,15,21,28,36,45,55] self.generator = euler12.trianglegenerator() self.results = [] while len(self.results) != 10: self.results.append(self.generator.next()) self.assertEqual(self.seq, self.results) def testdivisors(self): """ Ensure that the divisors function can properly factor the number 28. """ self.number = 28 self.answer = [1,2,4,7,14,28] self.assertEqual(self.answer, euler12.divisors(self.number)) if __name__ == '__main__': unittest.main() Now, when I execute this from IDLE and from the command line while in the directory, I get the following error: Traceback (most recent call last): File "C:\Documents and Settings\jbennet\My Documents\Python\eulerproject\tests\testeuler12.py", line 2, in <module> from .. import euler12 ValueError: Attempted relative import in non-package I think the problem is that since I'm running it directly, I can't do relative imports (because __name__ changes, and my vague understanding of the packages description is that __name__ is part of how it tells what package it's in), but

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