can not run `--dev` from SANIC CLI on windows

Describe the bug while running sanic --dev server.app occures an error:

Error while finding module specification for '__main__' (ValueError: __main__.__spec__ is None)

Code snippet server.py

from sanic import Sanic
from sanic.response import text

app = Sanic("MyHelloWorldApp")


@app.get("/")
async def hello_world(request):
    return text("Hello, world.")

Expected behavior A clear and concise description of what you expected to happen.

Environment (please complete the following information):

• OS: windows 10
• Version: latest sanic

[ahopkins]

I need to investigate it more first. Meaning I need to get onto my windows laptop and see why the entry point is not working and whether it is an implementation issue or an OS issue.

[nattheriddle1]

@prryplatypus Yes, using the --auto-reload flag is sufficient to produce the same error.

I just tried that workaround command on my first project (without any of the previous __init__.py workarounds) and it worked!

The other workaround, which I have been using since I cannot use the CLI, involves setting up my application.py file to serve the app when directly imported, like…

if __name__ == "__main__":
    app.run(auto_reload=True)

…and then running python application.py or python -m application on the command line.