Use socket.gethostname() instead of os.environ["HOST"]. That should work on all systems.
-rw-r--r-- 179 AUTHORS
-rw-r--r-- 1139 ChangeLog
-rw-r--r-- 477 MANIFEST
-rw-r--r-- 693 TODO
drwxr-xr-x - bin
drwxr-xr-x - classes
drwxr-xr-x - conf
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drwxr-xr-x - lib
-rwxr-xr-x 3273 setup.py