lsst/afw

LSST data management: pipeline library code and primitives including images and tables

afw

afw is a package in the LSST Science Pipelines.

Python module documentation:

• lsst.afw.cameraGeom
• lsst.afw.coord
• lsst.afw.detection
• lsst.afw.display
• lsst.afw.fits
• lsst.afw.formatters
• lsst.afw.geom
• lsst.afw.image
• lsst.afw.math
• lsst.afw.table
• lsst.afw.typehandling

afw's Issues

Raise descriptive error for broken display install

Consider the following code and the scenario of the 'matplotlib' backend and a broken install where lsst.display is not available.
https://github.com/lsst/afw/blob/master/python/lsst/afw/display/interface.py#L85-L106

It raises the somewhat cryptic error message:

RuntimeError: Unable to set backend to matplotlib: "module 'matplotlib' has no attribute 'DisplayImpl'"

While the real underlying issue is that lsst.display is not available, matplotlib should never be expected to have a DisplayImpl attribute.

My naive approach of shuffling the order of elements in the tuple probably makes no sense, adding another try/except might be enough to raise a more relevant error.

Let me know if you would like a quick PR. (The install has since been fixed, so I won't have a good way to test it).

Test failures

There's 21 test failures that appear to be related with cfitsio errors because some files cannot be found by git-lfs. I have put the full log at:
http://sprunge.us/NEPR