[Bug] ModuleNotFoundError: No module named 'zstandard'

Description

When attempting to start the Uvicorn server with the command uvicorn --reload api.main:app, the process fails with a ModuleNotFoundError for the module zstandard.

Steps to Reproduce

Ensure the virtual environment is activated: source .venv/bin/activate
Run the command: uvicorn --reload api.main:app

Expected Behavior

The Uvicorn server should start and run without any module import errors.

Actual Behavior

The server fails to start, and the following traceback is displayed:

(.venv) raul@raul:~/scidx-api$ uvicorn --reload api.main:app
INFO:     Will watch for changes in these directories: ['/home/raul/scidx-api']
INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [1446945] using WatchFiles
Process SpawnProcess-1:
Traceback (most recent call last):
  File "/usr/lib/python3.10/multiprocessing/process.py", line 314, in _bootstrap
    self.run()
  File "/usr/lib/python3.10/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
  File "/home/raul/scidx-api/.venv/lib/python3.10/site-packages/uvicorn/_subprocess.py", line 80, in subprocess_started
    target(sockets=sockets)
  File "/home/raul/scidx-api/.venv/lib/python3.10/site-packages/uvicorn/server.py", line 65, in run
    return asyncio.run(self.serve(sockets=sockets))
  File "/usr/lib/python3.10/asyncio/runners.py", line 44, in run
    return loop.run_until_complete(main)
  File "uvloop/loop.pyx", line 1517, in uvloop.loop.Loop.run_until_complete
  File "/home/raul/scidx-api/.venv/lib/python3.10/site-packages/uvicorn/server.py", line 69, in serve
    await self._serve(sockets)
  File "/home/raul/scidx-api/.venv/lib/python3.10/site-packages/uvicorn/server.py", line 76, in _serve
    config.load()
  File "/home/raul/scidx-api/.venv/lib/python3.10/site-packages/uvicorn/config.py", line 434, in load
    self.loaded_app = import_from_string(self.app)
  File "/home/raul/scidx-api/.venv/lib/python3.10/site-packages/uvicorn/importer.py", line 22, in import_from_string
    raise exc from None
  File "/home/raul/scidx-api/.venv/lib/python3.10/site-packages/uvicorn/importer.py", line 19, in import_from_string
    module = importlib.import_module(module_str)
  File "/usr/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/home/raul/scidx-api/api/main.py", line 5, in <module>
    import api.routes as routes
  File "/home/raul/scidx-api/api/routes/__init__.py", line 3, in <module>
    from .register_routes import router as register_router
  File "/home/raul/scidx-api/api/routes/register_routes/__init__.py", line 8, in <module>
    from .post_stream import router as post_stream_router
  File "/home/raul/scidx-api/api/routes/register_routes/post_stream.py", line 2, in <module>
    from api.services.streaming_services.stream_manager import create_stream
  File "/home/raul/scidx-api/api/services/streaming_services/__init__.py", line 1, in <module>
    from .compressor import compress_data, decompress_data
  File "/home/raul/scidx-api/api/services/streaming_services/compressor.py", line 1, in <module>
    import zstandard
ModuleNotFoundError: No module named 'zstandard'

Possible Solution

Ensure the zstandard module is installed in the virtual environment. You can install it by running:

pip install zstandard

Additional Context

None.

sci-ndp / scidx-api

[Bug] ModuleNotFoundError: No module named 'zstandard' #68