Python client with codegen 2.3.0 does not include api_client attribute in configuration which breaks tests after generation

[peacepirate]

Description

When generating python client with codegen 2.3.0, the Configuration class does not initialize an api_client attribute. This attribute is expected in the DefaultApi class initialization and hence fails the tests we are trying to run via CI automation.

This issue does not exist in 2.2.3 and has been tested and verified for the same OpenAPI spec.

Swagger-codegen version

2.3.0

Swagger declaration file content or url

Unfortunately the spec file is in a private repository right now so cannot be shared.

Command line used for generation

swagger-codegen generate -i api.yaml -l python -o python_client/ -c config/python.json

Steps to reproduce

1. Create the python_client and
2. Run the unit tests which would initialize the client.
   This would fail because of "config object has no attribute api_client"

Related issues/PRs

Suggest a fix/enhancement

Either initialize the api_client in configuration if it is in use, or otherwise remove the instances of config.api_client from DefaultApi class.

[wing328]

@peacepirate thanks for reporting the issue.

cc @taxpon @frol @mbohlool @cbornet @kenjones-cisco

[wing328]

Either initialize the api_client in configuration if it is in use, or otherwise remove the instances of config.api_client from DefaultApi class.

Can you please file a PR so that we can review the fix more easily?
The Python mustache templates can be found in https://github.com/swagger-api/swagger-codegen/tree/master/modules/swagger-codegen/src/main/resources/python

[kenjones-cisco]

@peacepirate
Can you provide the information within config/python.json so we can see the exact type of python client is being generated?