import _XXXXXX

[Skip Montanaro]

    Robert> When a Python program declares import _XXXX.  What form is XXXX
    Robert> when the underbar is included (_XXX)?

There's no special form.  The leading underscore is there to alert people
they should not normally import that module directly.  For example, people
should import bsddb, not _bsddb.  Same goes for (the third part modules)
MySQLdb and _mysql.  In both cases, the former builds on the latter.

Skip