As of setuptools 46.4.0, this extracts the attribute value statically
using the ast module, if possible. This allows it to work properly even
if the attribute is stored in a file that cannot be imported at setup
time (e. g. because of dependencies that might not be installed yet).
Reading the version number using attr: rsrcfork.__version__ will no
longer work properly if rsrcfork has non-stdlib dependencies at import
time, because setuptools needs to be able to import rsrcfork and read
the version number before the dependencies are installed.
As a workaround, our setup.py now manually parses the version number
from rsrcfork/__init__.py using the ast module.
This caused normal installs (i. e. without --editable) of this library
to not include the rsrcfork.compress subpackage, and made everything
unusable as a result. Oops.
Altough this library is OS-independent, it is specifically relevant to
Classic Mac OS and OS X, and provides some extra functionality on OS X
(reading actual resource forks, instead of resource fork data stored in
data forks/regular files).
"Topic :: Software Development :: Libraries :: Python Modules" appears
to be specifically for libraries used to develop Python modules, and
not for Python modules in general. A few more appropriate classifiers
have been added instead.
dgelessus