Improve robustness of setup.py in the absence of certain dependencies #19
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Three changes to improve installation for users who may not already have all the dependencies installed:
webbpsf
--webbpsf/__init__.py
imports from POPPY, which will not (necessarily) be available when setup.py is run. (imp
andast
are standard library modules used to add this functionality)numpy
toinstall_requires
andsetup_requires
. (Currently, one of the AstroPy helpers tries to import NumPy, so it's necessary insetup_requires
according to the documented meaning of that option. It's possible this won't be needed if the AstroPy helpers are changed not to have a hard dependency on NumPy at this point in the install.)