Can't generate python client

[mkuklik]

🐛 Bug Report

Python client generation fails using grpio_tools.I am using a_bit_of_everything.proto from examples.

To Reproduce

1. in the root directory of grpc-gateway I run

python` -m grpc_tools.protoc a_bit_of_everything.proto --python_out=./proto/ --grpc_python_out=./proto/ \
  	--proto_path `pwd`/examples/internal/proto/examplepb

2. in python

import a_bit_of_everything_pb2

Expected behavior

Actual Behavior

When trying to import a_bit_of_everything_pb.py I get the following errors,

Traceback (most recent call last):
File "", line 1, in
File "/Users/mkuklik/tshub/grpc-gateway/a_bit_of_everything_pb2.py", line 20, in
from protoc_gen_openapiv2.options import annotations_pb2 as protoc__gen__openapiv2_dot_options_dot_annotations__pb2
File "/Users/mkuklik/tshub/grpc-gateway/protoc_gen_openapiv2/options/annotations_pb2.py", line 18, in
DESCRIPTOR = _descriptor.FileDescriptor(
File "/Users/mkuklik/tshub/grpc-gateway/examples/internal/proto/examplepb/.venv/lib/python3.8/site-packages/google/protobuf/descriptor.py", line 941, in new
return _message.default_pool.AddSerializedFile(serialized_pb)
TypeError: Couldn't build proto file into descriptor pool!
Invalid proto descriptor for file "annotations.proto":
protoc-gen-openapiv2/options/openapiv2.proto: Import "protoc-gen-openapiv2/options/openapiv2.proto" has not been loaded.
grpc.gateway.protoc_gen_openapiv2.options.openapiv2_swagger: "grpc.gateway.protoc_gen_openapiv2.options.Swagger" seems to be defined in "openapiv2.proto", which is not imported by "annotations.proto". To use it here, please add the necessary import.
grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation: "grpc.gateway.protoc_gen_openapiv2.options.Operation" seems to be defined in "openapiv2.proto", which is not imported by "annotations.proto". To use it here, please add the necessary import.
grpc.gateway.protoc_gen_openapiv2.options.openapiv2_schema: "grpc.gateway.protoc_gen_openapiv2.options.Schema" seems to be defined in "openapiv2.proto", which is not imported by "annotations.proto". To use it here, please add the necessary import.
grpc.gateway.protoc_gen_openapiv2.options.openapiv2_tag: "grpc.gateway.protoc_gen_openapiv2.options.Tag" seems to be defined in "openapiv2.proto", which is not imported by "annotations.proto". To use it here, please add the necessary import.
grpc.gateway.protoc_gen_openapiv2.options.openapiv2_field: "grpc.gateway.protoc_gen_openapiv2.options.JSONSchema" seems to be defined in "openapiv2.proto", which is not imported by "annotations.proto". To use it here, please add the necessary import.

Even if I generate code for protoc-gen-openapiv2/options/ and protoc-gen-openapiv2/options/openapiv2.proto
and place them in ./grpc/gateway/protoc_gen_openapiv2/options/

I still get:

Invalid proto descriptor for file "annotations.proto":
protoc-gen-openapiv2/options/openapiv2.proto: Import "protoc-gen-openapiv2/options/openapiv2.proto" has not been loaded.
grpc.gateway.protoc_gen_openapiv2.options.openapiv2_swagger: "grpc.gateway.protoc_gen_openapiv2.options.Swagger" seems to be defined in "openapiv2.proto", which is not imported by "annotations.proto". To use it here, please add the necessary import.

Your Environment

System:
Darwin mbp-geum 19.6.0 Darwin Kernel Version 19.6.0: Mon Aug 31 22:12:52 PDT 2020; root:xnu-6153.141.2~1/RELEASE_X86_64 x86_64

Python:
appier==1.20.5
cachetools==4.1.1
certifi==2020.6.20
chardet==3.0.4
google-api==0.1.12
google-api-core==1.23.0
google-auth==1.23.0
googleapis-common-protos==1.52.0
grpcio==1.33.2
grpcio-tools==1.33.2
idna==2.10
protobuf==3.13.0
pyasn1==0.4.8
pyasn1-modules==0.2.8
pytz==2020.1
requests==2.24.0
rsa==4.6
six==1.15.0
urllib3==1.25.11

[johanbrandhorst]

Hi! Sorry you're having trouble using the gateway. Unfortunately I have no experience generating protobuf files with python, and this is not an issue with the gateway itself. I recommend you find someone who has experience generating python protobuf files to help you.

[iamnoah]

If anyone is looking for a package with the generated python code for protoc_gen_openapiv2.options, I've uploaded one to PyPi.

pip install grpc-gateway-protoc-gen-openapiv2

[jonathanve]

That's great @iamnoah

[samahali]

@iamnoah
sir, u mentioned here
Building
1 - Install go
2 - ./gen-openapi-proto.sh will generate the code from grpc-gateway.
3- python3 -m pip install --upgrade build && python3 -m build to build the package.
4- optional - setup PyPi credentials and python3 -m pip install --user --upgrade twine && python3 -m twine upload --repository pypi dist/*

I don't understand this file where should I find it "2 - ./gen-openapi-proto.sh will generate the code from grpc-gateway."