gistfile1.txt

eugeny@eugeny-thinkpad ~/tmp/b> find ..
..
../a
../a/__init__.py
../a/__init__.pyc
../b
../b/__init__.pyc
../b/script.py
../p.pyc
eugeny@eugeny-thinkpad ~/tmp/b> find .. | grep -v pyc
..
../a
../a/__init__.py
../b
../b/script.py
eugeny@eugeny-thinkpad ~/tmp/b> cat ../a/__init__.py
def foo():
        pass

print 'a imported'
eugeny@eugeny-thinkpad ~/tmp/b> cat script.py 
import imp
a = imp.load_source('a', '../a/__init__.py')

eugeny@eugeny-thinkpad ~/tmp/b> python script.py        
a imported