set_defhost
Name
set_defhost -- set default host name [DV]
Synopsis
set_defhost(host)
Parameters
- host
- New default host (string/None). 
Return Type
- string or None
-          Previous default host specification.
         
Exceptions
- TypeError
-          Bad argument type, or too many arguments.
         
Description
     set_defhost() sets the default host value
     for new connections. If None is supplied as parameter, environment
     variables will be used in future connections. It returns the 
     previous setting for default host.