Strange arcpy polyline geometry behavior. (mixins._passthrough object)

Question

Hello guys, is there someone who were annoyed by this kind of problem? So, first of all I want you to notice that the feature class Roads has a POLYLINE geometry type, and there are no multipart features in it. import arcpy for i in arcpy.da.SearchCursor(r'C:\Users\...\Administrative_area.gdb\Roads', ["SHAPE@"]): print(i[0])‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ Normally, the output for this code will be something like this: And it works. Now the problem appears when I put this little piece of code in the main script: def get_near_data(self): with arcpy.da.SearchCursor(r'C:\Users\...\Administrative_area.gdb\Roads', ["SHAPE@"]) as reader: for f in reader: print(f[0])‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ And the output is not the same as in the first case. This is not geometry. I've noticed that if I change the path for feature class Roads to another feature class which has a polygon geometry type, it works just fine again, take a look: def get_near_data(self): with arcpy.da.SearchCursor(r"C:\Users\...\ArcGIS\Administrative_area.gdb\CountyBoundary", ["SHAPE@"]) as reader: for f in reader: print(f[0])‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ And the output is going to be like this: So, what is going on here? Why geometries of polyline feature classes aren't returned while geometries of polygons are?

DanPatterson_Retired · Answer

Not sure what you are looking for, but there are simpler ways to confirm geometry types import arcpy in_fc1 = r'C:\Arc_projects\profile_maker\profiler.gdb ransect_split' cur = arcpy.da.SearchCursor(in_fc1, "SHAPE@") cur.next() (<Polyline object at 0x1fe0ea8cb38[0x1fe11929b70]>,) # ---- or even cur.__getitem__(0) <Polyline object at 0x1fe0ea8cb38[0x1fe11929b70]> cur._dtype dtype([('SHAPE@', 'O')])‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ but it can't be converted using _as_narray since SHAPE@ is used which returns a geometry object rather than the alternatives which allow you to return coordinates and convert directly to something useable cur = arcpy.da.SearchCursor(in_fc1, "SHAPE@XY") cur._as_narray() # ---- option 1 return coordinates as a tuple of a list array([([ 340936.21594756, 5046043.74849692],), ([ 340859.41938063, 5046107.73866551],), ([ 340781.86449519, 5046170.67589448],), ([ 340711.39750497, 5046241.13812473],), ([ 340657.89948473, 5046324.76720457],), ([ 340614.92821842, 5046414.92588379],), ([ 340560.40635839, 5046498.12427651],), ([ 340492.34102822, 5046571.17846557],), ([ 340422.96741265, 5046643.0664908 ],), ([ 340359.31866013, 5046720.00262745],), ([ 340287.12978867, 5046788.80373807],), ([ 340208.32592782, 5046850.21868976],), ([ 340125.05206674, 5046905.49227955],), ([ 340042.75438658, 5046962.04556696],), ([ 340005.82725 , 5046995.80015 ],)], dtype=[('SHAPE@XY', ', (2,))]) cur = arcpy.da.SearchCursor(in_fc1, ["SHAPE@X", "SHAPE@Y"]) cur._as_narray() # ---- option 2, return the array as two separate fields Out[38]: array([(340936.21594756, 5046043.74849692), (340859.41938063, 5046107.73866551), (340781.86449519, 5046170.67589448), (340711.39750497, 5046241.13812473), (340657.89948473, 5046324.76720457), (340614.92821842, 5046414.92588379), (340560.40635839, 5046498.12427651), (340492.34102822, 5046571.17846557), (340422.96741265, 5046643.0664908 ), (340359.31866013, 5046720.00262745), (340287.12978867, 5046788.80373807), (340208.32592782, 5046850.21868976), (340125.05206674, 5046905.49227955), (340042.75438658, 5046962.04556696), (340005.82725 , 5046995.80015 )], dtype=[('SHAPE@X', '), ('SHAPE@Y', ')]) ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍