Sean Gillies wrote: > On Jan 21, 2010, at 5:35 PM, Patrick Hartling wrote: > >> Howard Butler wrote: >>> On Jan 21, 2010, at 9:30 AM, Patrick Hartling wrote: >>> >>>> We have run into a strange problem with the is_empty property on >>>> Shapely >>>> goemetry objects failing on Linux. We are using r1485 from the >>>> Shapely 1.2 >>>> branch with GEOS 3.1.1 and Python 2.6.2 on 64-bit Ubuntu Linux >>>> 9.04. The >>>> code below demonstrates the problem: >>>> >>>> import shapely.geometry >>>> assert shapely.geometry.Point(1,1).is_empty == False >>> What about this? Maybe the chaining is causing the reference to go >>> bad. >>> >>> p = shapely.geometry.Point(1,1) >>> p.is_empty >> The result is the same in that case: is_empty still returns False. >> >> -Patrick > > An "empty" geometry is an odd beast. Not quite the same as None, it's > a reflection of whether the geometry has coordinates or a sequence of > coordinates. A Point with x and y values set is definitely not empty. > The following is correct: > > >>> from shapely.geometry import Point > >>> p = Point(0, 0) > >>> p.is_empty > False > > Thanks for trying the code, Patrick. I'm going to try to make a second > alpha release of 1.2 tonight or tomorrow and will notify this list.
I reported that incorrectly in response to Howard. Using your example from above, I get this result: >>> from shapely.geometry import Point >>> p = Point(0, 0) >>> p.is_empty True I'll try updating to the latest version from the Shapely 1.2 branch and see how that works. -Patrick -- Patrick L. Hartling Senior Software Engineer, Priority 5 http://www.priority5.com/ The information transmitted in this communication is intended only for the person or entity to which it is addressed and contains proprietary material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please destroy any copies, contact the sender and delete the material from any computer.
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