My problem is not specific to EDITOR variable. E.g. sometimes I need to set PYTHONPATH per specific command. What irritates me is that the syntax to do that. I

My problem is not specific to EDITOR variable. E.g. sometimes I need to set PYTHONPATH per specific command. What irritates me is that the syntax to do that. I am not asking for a way to make a variable universal, I am looking for a way to specify variable per command.