Details
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Type:
Improvement
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Status: Won't Fix
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Resolution: Done
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Fix Version/s: None
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Component/s: afw
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Labels:None
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Team:Alert Production
Description
afw.display apparently cannot deal with pure numpy arrays. They have to be wrapped in an afw.image first. It would be very useful to be able to just stuff a numpy array through to ds9 (or whatever display system is configured).
The following command sequence fails:
import lsst.afw.display.ds9 as ds9
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data = np.zeros((10,10), dtype=np.float32)
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In [3]: ds9.mtv(data)
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---------------------------------------------------------------------------
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RuntimeError Traceback (most recent call last)
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<ipython-input-3-38b73304e0e0> in <module>()
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----> 1 ds9.mtv(data)
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/Users/parejkoj/lsst/lsstsw/stack/DarwinX86/afw/2.2016.10-20-g39312e7/python/lsst/afw/display/ds9.pyc in mtv(data, frame, title, wcs, *args, **kwargs)
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78
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79 def mtv(data, frame=None, title="", wcs=None, *args, **kwargs):
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---> 80 return getDisplay(frame, create=True).mtv(data, title, wcs, *args, **kwargs)
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81
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82 def erase(frame=None):
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/Users/parejkoj/lsst/lsstsw/stack/DarwinX86/afw/2.2016.10-20-g39312e7/python/lsst/afw/display/interface.pyc in mtv(self, data, title, wcs)
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384 self._impl._mtv(data.getImage(), data.getMask(True), wcs, title)
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385 else:
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--> 386 raise RuntimeError, "Unsupported type %s" % repr(data)
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387 #
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388 # Graphics commands
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RuntimeError: Unsupported type array([[ 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.],
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[ 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.],
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[ 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.],
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[ 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.],
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[ 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.],
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[ 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.],
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[ 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.],
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[ 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.],
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[ 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.],
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[ 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.]], dtype=float32)
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But this works:
img = afwImage.ImageF(data)
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ds9.mtv(img)
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Attachments
Issue Links
Activity
The problem reported in the comment above was fixed in DM-9433.
It feels like wrapping in afwImage isn't a big hurdle, and this ticket has clearly not bubbled to the top of anybody's list in ~4 years, so I'll close it down. Please feel free to reopen if you strongly disagree.
While looking for technical debt to deal with, I found this one and re-tested it: I received a different exception this time, which looks like a code bug (maybe due to scope changes in python3?). lsst.afw.display.ds9 needs some linter love and/or to have a DeprecatedWarning raised on import.
In [9]: ds9.mtv(x)---------------------------------------------------------------------------NameError Traceback (most recent call last)<ipython-input-9-6b39caf68641> in <module>()----> 1 ds9.mtv(x)/home/parejkoj/lsst/lsstsw/stack/Linux64/afw/12.1-30-ga6be655+2/python/lsst/afw/display/ds9.py in mtv(data, frame, title, wcs, *args, **kwargs)8283 def mtv(data, frame=None, title="", wcs=None, *args, **kwargs):---> 84 return getDisplay(frame, create=True).mtv(data, title, wcs, *args, **kwargs)8586 def erase(frame=None):/home/parejkoj/lsst/lsstsw/stack/Linux64/afw/12.1-30-ga6be655+2/python/lsst/afw/display/ds9.py in getDisplay(*args, **kwargs)4445 def getDisplay(*args, **kwargs):---> 46 raise e4748 class DisplayImpl(object):NameError: name 'e' is not defined