connexion.exceptions.ResolverError: No module named When running pyz file

I installed all dependencies in dist folder pip install -r requirements.txt --target dist/

I created .whl package for pythonapp using below command: python3 setup.py bdist_wheel

and installed pythonapp-1.0.0-py3-none-any.whl package into dist folder, After that created create pyz file from it from following command

shiv --site-packages dist -e "pythonapp.__main__:main" -o ps.pyz

When I executed pyz package using python ps.pyz

raise ResolverError(msg, sys.exc_info())
connexion.exceptions.ResolverError: \<ResolverError: Cannot resolve operationId "stationdetails.getstationName"! Import error was "No module named 'stationdetails'"\>

I tried using different connexion resolve like RelativeResolver, RestyResolver, but nothing seems to work.

I tried remove init.py file also, but if I remove init.py file, whl package does not include all python files.

Any help would be appreciated.

Directory Structure

test
- setup.py
- dist
- pythonapp
  - __init__.py (empty)
  - __main__.py
    \_ openapi.yml
  - stationdetails.py

stationdetails.py

import logging

def getstationName():
    pass

openapi.yml

paths:
  /getstationName:
    get:
      tags:
        - pythonapp
      operationId: stationdetails.getstationName
      responses:
        '200':
          description: ok

import connexion

def main():
    app = connexion.App(__name__)
    app.add_api('openapi.yml')
    app.run(host="0.0.0.0",port=8000)

if __name__ == "__main__":
    main()

setup.py (outside pythonapp folder)

from setuptools import find_packages, setup

version = '1.0.0'

setup(name='pythonapp',
      version=version,
      description='pythonapp',
      url='',
      author='test',
      author_email='',
      packages=find_packages(),
      data_files=[('pythonapp',
                   ['pythonapp/openapi.yml'])],
      include_package_data=True,
      zip_safe=False,
      )

A shot in the dark, but try changing

      operationId: stationdetails.getstationName

to

      operationId: pythonapp.stationdetails.getstationName

When connexion is trying to import stationdetails it'd fail because that module is inside pythonapp, so adding that to the operationId might fix it.

If the problem persists, please note that .whl and .pyz files are just zip archives, and you can open them to inspect if the stationdetails.py was copied successfully and the folder structure is intact.