[Python] MergeFrom() raises TypeError for the same class

[parthea]

What version of protobuf and what language are you using?
Version: main
Language: Python

What operating system (Linux, Windows, ...) and version?
Linux

What runtime / compiler are you using (e.g., python version or gcc version)
Python 3.9.12

What did you do?
Steps to reproduce the behavior:

1. Install the google-cloud-gke-hub client
2. Run the sample code provided in Unable to configure config management with Clusters registered with Anthos googleapis/python-gke-hub#151

What did you expect to see
I expected the code to run without error.

What did you see instead?
I saw the following exception TypeError('Parameter to MergeFrom() must be instance of same class: expected MembershipSpec got google.cloud.gkehub_v1.configmanagement_v1.types.configmanagement.MembershipSpec.')

Make sure you include information that can help us debug (full error message, exception listing, stack trace, logs).

Anything else we should know about your project / environment

I'm working on troubleshooting an issue that a user reported in the python client library here where protobuf is raising Parameter to MergeFrom() must be instance of same class: . I'm able to re-create the error using the sample code that the user shared in the issue. I'm having trouble figuring out why these 2 classes are not the same. There is only one class with MembershipSpec and I'm not sure what's causing this issue. I tried debugging but I haven't been able to locate the discrepancy.
https://github.com/googleapis/python-gke-hub/search?q=%22class+MembershipSpec%22.

>>_FullyQualifiedClassName(msg.__class__)
'google.cloud.gkehub_v1.configmanagement_v1.types.configmanagement.MembershipSpec'
>>_FullyQualifiedClassName(cls)
'MembershipSpec'

[zhangskz]

What protobuf version are you on?

[parthea]

With protobuf==3.20.1 , I get TypeError('Parameter to MergeFrom() must be instance of same class: expected MembershipSpec got google.cloud.gkehub_v1.configmanagement_v1.types.configmanagement.MembershipSpec.')

With protobuf 4.21.0 I see a different error

  File "/usr/local/google/home/partheniou/git/python-gke-hub/check.py", line 62, in <module>
    create_feature(client, parent, membership_name)
  File "/usr/local/google/home/partheniou/git/python-gke-hub/check.py", line 27, in create_feature
    member_spec = MembershipFeatureSpec(
  File "/usr/local/google/home/partheniou/.pyenv/versions/py39/lib/python3.9/site-packages/proto/message.py", line 585, in __init__
    super().__setattr__("_pb", self._meta.pb(**params))
TypeError: Message must be initialized with a dict: google.cloud.gkehub.v1.MembershipFeatureSpec

[UrielShimony]

is there any news with this issue ?
(reproduced in our product as well only on Apple M1 )

[lhuhn-wish]

We are also seeing this error on Apple M1. It occurs at least as far back as protobuf==3.8.0 on Python 2.x.

[lhuhn-wish]

We were able to resolve this by following the ideas in #7408 and changing the path we import with.

[chikubee]

We were able to resolve this by following the ideas in #7408 and changing the path we import with.

@lhuhn-wish I am getting the same issue for different proto files. I tried the suggested changes but that does not seem to work with protobuf 3.20.1. Which protobuf version are you using?

[parthea]

I'm going to close this issue as my issue was unrelated to protobuf. I was using proto-plus which appears to have a bug in marshal.py. I've opened googleapis/proto-plus-python#348 to start the process of proposing a fix.