The license issue is only applicable to the license in python files.

This refers also to GPL License Question (#15).

"In addition to the permissions in the GNU General Public License,
the authors give you unlimited permission to link the compiled
version of this file into combinations with other programs,
and to distribute those combinations without any restriction
coming from the use of this file. (The General Public License
restrictions do apply in other respects; for example, they cover
modification of the file, and distribution when not linked into
a combined executable.)"

This means that a non-GPL application or library shall import "pyc" (compiled python) not really practicable.

Add the following to the COPYING and change the exception in python files.

"In addition to the permissions in the GNU General Public License,
the authors give you unlimited permission to import this python file into combinations
with other programs, and to distribute those combinations without any restriction
coming from the use of this file. (The General Public License
restrictions do apply in other respects; for example, they cover
modification of the file, and distribution when not imported into
a combined executable.)"

"link the compiled version of this file" => "import this python file"
"not linked" => "not imported"