Arcpy Geometry class in the class into the trap Array

1, a phenomenon explained

    Arcpy.da.searchcursor obtained using Geometry, Geometry converted into Array, then converted back from Array Geometry. If Geometry contains an inner ring, a process that could lead to the loss of the inner ring, and irreversible.

    For example, the original pattern as shown below:

Use the following code:

import arcpy
arcpy.env.workspace = "C:\\scripts\\test8.gdb"
arcpy.env.overwriteOutput = True
fc1 = "feature_with_hole"
fc2 = "target_feature"
arcpy.CreateFeatureclass_management(arcpy.env.workspace, fc2, "POLYGON", fc1, "DISABLED", "DISABLED", fc1)
c1 = arcpy.da.SearchCursor(fc1, ["SHAPE@"], "OBJECTID = 1")
for row in c1:
    geo1 = row[0]
array = geo1.getPart(0)
c2 = arcpy.da.InsertCursor(fc2, ["SHAPE@"])
geo2 = arcpy.Geometry('polygon', array)
c2.insertRow([geo2])

After two conversions, to give the following pattern:

2, Analysis

    After analysis, the conversion from the Array Geometry over, between one of the inner and outer rings of Item None, by inserting the following code fragment demonstrated:

    

    Print results are as follows:

Whereas when converting back from Geometry Array, None Item Item and thereafter will be ignored, as evidenced by the following code fragment inserted:

Print results are as follows:

3, how to avoid?

    When converted back from Geometry Array, will None Item removed to the inner part of the full restore. Demonstrated by inserting the following code fragment:

    

    Print results are as follows:

    

4, summary

　　1) converted from Geometry over Array, is performed through a gap between the inner and outer rings None of the Item;

　　2) Array converted back Geometry, None Item and Item after will be ignored;

　　3）Array转换回Geometry时，将None Item去掉，即可将内环部分完整还原。