ModuleNotFoundError: No module named 'app' using uvicorn, fastapi

I am getting ModuleNotFoundError: No module named ‘app’ error.

Below (image) is almost everything you need to know about the issue. There have been other similar issues about this, but most of them were related to docker. I am not using docker and don’t know much about it.

This is a common problem I have observed. Any help is appreciated.

Complete Error

Process SpawnProcess-5:
Traceback (most recent call last):
  File "/usr/lib/python3.6/multiprocessing/process.py", line 258, in _bootstrap
    self.run()
  File "/usr/lib/python3.6/multiprocessing/process.py", line 93, in run
    self._target(*self._args, **self._kwargs)
  File "/xxxxx/geoprocessing-api/.venv/lib/python3.6/site-packages/uvicorn/subprocess.py", line 61, in subprocess_started
    target(sockets=sockets)
  File "/xxxxx/geoprocessing-api/.venv/lib/python3.6/site-packages/uvicorn/server.py", line 48, in run
    loop.run_until_complete(self.serve(sockets=sockets))
  File "/usr/lib/python3.6/asyncio/base_events.py", line 484, in run_until_complete
    return future.result()
  File "/xxxxxx/geoprocessing-api/.venv/lib/python3.6/site-packages/uvicorn/server.py", line 55, in serve
    config.load()
  File "/xxxxxxx/geoprocessing-api/.venv/lib/python3.6/site-packages/uvicorn/config.py", line 308, in load
    self.loaded_app = import_from_string(self.app)
  File "/xxxxx/geoprocessing-api/.venv/lib/python3.6/site-packages/uvicorn/importer.py", line 23, in import_from_string
    raise exc from None
  File "/xxxxx/geoprocessing-api/.venv/lib/python3.6/site-packages/uvicorn/importer.py", line 20, in import_from_string
    module = importlib.import_module(module_str)
  File "/usr/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/xxxxxxxxx/geoprocessing-api/app/server/app.py", line 2, in <module>
    from app.server.routes.config_route import router as ConfigRouter
ModuleNotFoundError: No module named 'app'

Please let me know if you need anything else. Thanks.

[darkl1ght]

@shawnwall, @Mause Thanks for the suggestions.

I found the reason for it. My PYTHONPATH environment variable was not set.

To set it, you can run the below command in the base directory of your project:

$ export PYTHONPATH=$PWD

This fixed my issue and I was able to use the imports along with the app.server.x.x.

Thanks for your insights though.

[Mause]

Then you have to fix the new error, in a similar way