Compatibility issues related to the lack of appropriate packages locations in scripts/paths.py

[Olga Maciaszek-Sharma]

After the install, the following loaction for external packages is added to paths.py:

sitedir = os.path.join(sys.prefix, 'lib', 'python'+sys.version[:3],
                       'site-packages')
sys.path.append(sitedir)

However, dependig on the distribution, installation method or system version (i.e. x64), packages can be also stored in different locations, for example:

sitedir = os.path.join(sys.prefix, 'local/lib', 'python'+sys.version[:3],
                       'dist-packages')
sys.path.append(sitedir)

sitedir = os.path.join(sys.prefix, 'lib', 'python'+sys.version[:3],
                       'dist-packages')
sys.path.append(sitedir)

sitedir = os.path.join(sys.prefix, 'lib64', 'python'+sys.version[:3],
                       'site-packages')
sys.path.append(sitedir)

This bug doesn't seem to affect mailman itself, however it affects the systers additions, as storm and psycopg2 are used there.

If the paths.py file is not manually edited, for many distributions/systems, the systers modification won't work and will log errors related to the imports from storm and psycopg2.