AttributeError: __flags__ using muppy

[jmilloy]

I confirmed that I can use muppy or a tracker with the expected results in a simple case. But when I import my library, I get an AttributeError when using muppy. It is not informative enough for me to figure out what aspect of my library is causing the problem.

from pympler import muppy
import <my library>
objs = muppy.get_objects()

This code gives the following exception

Traceback (most recent call last):
  File "/home/jmilloy/test.py", line 5, in <module>
    objs = muppy.get_objects()
  File "/usr/local/lib/python2.7/dist-packages/pympler/muppy.py", line 45, in get_objects
    if not _is_containerobject(ref):
  File "/usr/local/lib/python2.7/dist-packages/pympler/muppy.py", line 246, in _is_containerobject
    if type(o).__flags__ & __TPFLAGS_HAVE_GC == 0:
AttributeError: __flags__

You won't be able to reproduce because I can't give you access to my library, but maybe we can figure out what's causing it. Have you seen this before?

[Pankrat]

I haven't seen this yet. Which exact version of Python (and Pympler) are you using?

It would be interesting to know which kind of object will raise the AttributeError. If you could catch the error in _is_containerobject and log repr(o) and type(o) this might help figuring out how to fix this (whether to return True or False in this case).

Thanks for the report.

[jmilloy]

I've got python 2.7.10 and pympler 0.4.2.

The object is a VTK object (which I think is due to mayavi in my project):

ipdb> type(o)
<type 'vtkclass'>
ipdb> repr(o)
'<vtkclass vtkInfovisPython.vtkCircularLayoutStrategy>'

[Pankrat]

Thanks - that helped. This should now be fixed on master. Please re-open the ticket if it still doesn't work.

[jmilloy]

Cool, thanks!