Great article. Is it just me or the prepend/append examples are swapped? ie. If you want to append TO your PYTHONPATH you should do PYTHONPATH=$PYTHONPATH:/some/new/path
It depends on what do you mean by "append", I guess. Append the search path (e.g. "try this one first"), then /path:$PYTHONPATH is correct. If you mean append the variable then your example is correct.
