[raygun4py] AttributeError: class RaygunErrorMessage has no attribute '__mro__'

Here is the traceback:

[..] our code here
File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/raygun4py/raygunprovider.py", line 110, in send_exception
    return self._post(message)
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/raygun4py/raygunprovider.py", line 156, in _post
    json = jsonpickle.encode(raygunMessage, unpicklable=False)
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/jsonpickle/__init__.py", line 131, in encode
    warn=warn)
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/jsonpickle/pickler.py", line 42, in encode
    return backend.encode(context.flatten(value, reset=reset))
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/jsonpickle/pickler.py", line 142, in flatten
    return self._flatten(obj)
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/jsonpickle/pickler.py", line 146, in _flatten
    return self._pop(self._flatten_obj(obj))
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/jsonpickle/pickler.py", line 162, in _flatten_obj
    return flatten_func(obj)
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/jsonpickle/pickler.py", line 414, in _flatten_dict_obj
    flatten(k, v, data)
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/jsonpickle/pickler.py", line 480, in _flatten_key_value_pair
    data[k] = self._flatten(v)
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/jsonpickle/pickler.py", line 146, in _flatten
    return self._pop(self._flatten_obj(obj))
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/jsonpickle/pickler.py", line 162, in _flatten_obj
    return flatten_func(obj)
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/jsonpickle/pickler.py", line 414, in _flatten_dict_obj
    flatten(k, v, data)
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/jsonpickle/pickler.py", line 480, in _flatten_key_value_pair
    data[k] = self._flatten(v)
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/jsonpickle/pickler.py", line 146, in _flatten
    return self._pop(self._flatten_obj(obj))
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/jsonpickle/pickler.py", line 162, in _flatten_obj
    return flatten_func(obj)
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/jsonpickle/pickler.py", line 220, in _ref_obj_instance
    return self._flatten_obj_instance(obj)
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/jsonpickle/pickler.py", line 350, in _flatten_obj_instance
    if util.is_iterator(obj):
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/jsonpickle/util.py", line 341, in is_iterator
    return (isinstance(obj, collections.Iterator) and
  File "/Users/<user>/<folder>/env/lib/python2.7/abc.py", line 144, in __instancecheck__
    return cls.__subclasscheck__(subtype)
  File "/Users/<user>/<folder>/env/lib/python2.7/abc.py", line 180, in __subclasscheck__
    if issubclass(subclass, scls):
  File "/Users/<user>/<folder>/env/lib/python2.7/abc.py", line 161, in __subclasscheck__
    ok = cls.__subclasshook__(subclass)
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/backports_abc.py", line 66, in __subclasshook__
    mro = C.__mro__
AttributeError: class RaygunErrorMessage has no attribute '__mro__'

raygun4py==3.1.1, Python 2.7.10

Upgrading to 3.1.3 gives me a different error:

[..] our code here
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/raygun4py/raygunprovider.py", line 97, in send_exception
    errorMessage = raygunmsgs.RaygunErrorMessage(exc_type, exc_value, exc_traceback, options)
  File "/Users/<user>/<folder>/env/lib/python2.7/site-packages/raygun4py/raygunmsgs.py", line 167, in __init__
    if self.globalVariables:
AttributeError: RaygunErrorMessage instance has no attribute 'globalVariables'

This is my code (inside our application):

api_key = cfg.get('raygun', 'api_key')
from raygun4py import raygunprovider
client = raygunprovider.RaygunSender(api_key)

try:
    raise ValueError('test')
except Exception, e:
    client.send_exception(e)

---

Hm, this looks like a mismatch between a new-style class in python 2. As a workaround you can try replacing your client instantiation with this:

client = raygunprovider.RaygunSender('your_apikey', config={
    'transmit_global_variables': False,
    'transmit_local_variables': False
})

We'll debug this and get back to you with the results.

---

Thx. Unfortunately it throws the same error.

---

Hi Callum, any news on this? I would really like to log some errors ;-)

---

Happy New Year!!

Replacing the if self.globalVariables: line with if hasattr(self, 'globalVariables'): brings me back to the original issue:

AttributeError: class RaygunErrorMessage has no attribute '__mro__'

---