missing comtypes module attributes (comtypes.gen.esriFramework.AppRef)

Question

I am using comtypes and Mark Cederholm's Snippets.py (10.2 version) and have not been able to access comtypes.gen.esriFramework.AppRef.  I have made the required comtype edits for 10.2 compatibility, and verified that the relevant .pyc files are new.

The error message I get when I try to access comtypes.gen.esriFramework.AppRef is "AttributeError: 'module' object has no attribute 'AppRef'".

The attributes listed by executing "dir(comtypes.gen.esriFramework)" are:  ['_866AE5D3_530C_11D2_A2BD_0000F8774FB5_0_10_2', '__builtins__', '__doc__', '__file__', '__name__', '__package__', 'typelib_path'] which does not include "AppRef", although the Class "AppRef" is in the code of the freshly created comtypes\gen\_866AE5D3_530C_11D2_A2BD_0000F8774FB5_0_10_2.py

But I also noticed that a class does not seem to show up as an attribute when I execute "dir(comtypes.gen.esriFramework._866AE5D3_530C_11D2_A2BD_0000F8774FB5_0_10_2)" that yields ['__builtins__', '__doc__', '__file__', '__name__', '__package__', 'typelib_path']

Any idea what the problem is?  Is the information I provided above relevant to figuring it out?  How else can I troubleshoot this?

KerryAlley · Answer

I had already deleted all the .pyc and .pyo files from comtypes/gen.  At your suggestion I also deleted them from the comtypes folder, but I still had errors (I forget which).  I uninstalled and reinstalled comtypes-0.6.2 (from sourceforge) and that seems to have fixed everything!  Sometimes a fresh start is easier than figuring out what went wrong.

bixb0012 · Answer

Huh, not sure then.  For me, Background geoprocessing generates that exact error and disabling it makes it go away using the code above.  Maybe close out of ArcGIS Desktop and clean out all of the PYC and PYO files in the comtypes site package folder as well as clear out the gen folder under comtypes.

KerryAlley · Answer

Alas, I do not have Background Processing enabled.  Any other ideas?