Python

I ran Python, FastAPI, and PostgreSQL as docker-compose, but it doesn't work with these errors.
I don't know why this error occurs.
Full Error Message:

learn-fastapi-web-1  | Traceback (most recent call last):
learn-fastapi-web-1  |   File "<frozen runpy>", line 198, in _run_module_as_main
learn-fastapi-web-1  |   File "<frozen runpy>", line 88, in _run_code
learn-fastapi-web-1  |   File "/usr/local/lib/python3.11/site-packages/uvicorn/__main__.py", line 4, in <module>
learn-fastapi-web-1  |     uvicorn.main()
learn-fastapi-web-1  |   File "/usr/local/lib/python3.11/site-packages/click/core.py", line 1157, in __call__
learn-fastapi-web-1  |     return self.main(*args, **kwargs)
learn-fastapi-web-1  |            ^^^^^^^^^^^^^^^^^^^^^^^^^^
learn-fastapi-web-1  |   File "/usr/local/lib/python3.11/site-packages/click/core.py", line 1078, in main
learn-fastapi-web-1  |     rv = self.invoke(ctx)
learn-fastapi-web-1  |          ^^^^^^^^^^^^^^^^
learn-fastapi-web-1  |   File "/usr/local/lib/python3.11/site-packages/click/core.py", line 1434, in invoke
learn-fastapi-web-1  |     return ctx.invoke(self.callback, **ctx.params)
learn-fastapi-web-1  |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
learn-fastapi-web-1  |   File "/usr/local/lib/python3.11/site-packages/click/core.py", line 783, in invoke
learn-fastapi-web-1  |     return __callback(*args, **kwargs)
learn-fastapi-web-1  |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
learn-fastapi-web-1  |   File "/usr/local/lib/python3.11/site-packages/uvicorn/main.py", line 416, in main
learn-fastapi-web-1  |     run(
learn-fastapi-web-1  |   File "/usr/local/lib/python3.11/site-packages/uvicorn/main.py", line 587, in run
learn-fastapi-web-1  |     server.run()
learn-fastapi-web-1  |   File "/usr/local/lib/python3.11/site-packages/uvicorn/server.py", line 61, in run
learn-fastapi-web-1  |     return asyncio.run(self.serve(sockets=sockets))
learn-fastapi-web-1  |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
learn-fastapi-web-1  |   File "/usr/local/lib/python3.11/asyncio/runners.py", line 190, in run
learn-fastapi-web-1  |     return runner.run(main)
learn-fastapi-web-1  |            ^^^^^^^^^^^^^^^^
learn-fastapi-web-1  |   File "/usr/local/lib/python3.11/asyncio/runners.py", line 118, in run
learn-fastapi-web-1  |     return self._loop.run_until_complete(task)
learn-fastapi-web-1  |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
learn-fastapi-web-1  |   File "uvloop/loop.pyx", line 1517, in uvloop.loop.Loop.run_until_complete
learn-fastapi-web-1  |   File "/usr/local/lib/python3.11/site-packages/uvicorn/server.py", line 68, in serve
learn-fastapi-web-1  |     config.load()
learn-fastapi-web-1  |   File "/usr/local/lib/python3.11/site-packages/uvicorn/config.py", line 467, in load
learn-fastapi-web-1  |     self.loaded_app = import_from_string(self.app)
learn-fastapi-web-1  |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
learn-fastapi-web-1  |   File "/usr/local/lib/python3.11/site-packages/uvicorn/importer.py", line 21, in import_from_string
learn-fastapi-web-1  |     module = importlib.import_module(module_str)
learn-fastapi-web-1  |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
learn-fastapi-web-1  |   File "/usr/local/lib/python3.11/importlib/__init__.py", line 126, in import_module
learn-fastapi-web-1  |     return _bootstrap._gcd_import(name[level:], package, level)
learn-fastapi-web-1  |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
learn-fastapi-web-1  |   File "<frozen importlib._bootstrap>", line 1204, in _gcd_import
learn-fastapi-web-1  |   File "<frozen importlib._bootstrap>", line 1176, in _find_and_load
learn-fastapi-web-1  |   File "<frozen importlib._bootstrap>", line 1147, in _find_and_load_unlocked
learn-fastapi-web-1  |   File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
learn-fastapi-web-1  |   File "<frozen importlib._bootstrap_external>", line 940, in exec_module
learn-fastapi-web-1  |   File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
learn-fastapi-web-1  |   File "/main.py", line 5, in <module>
learn-fastapi-web-1  |     from . import crud, models, schemas
learn-fastapi-web-1  | ImportError: attempted relative import with no known parent package

Dockerfile:

FROM python:latest
COPY . .
RUN pip install -r requirements.txt
CMD python -m uvicorn --host=0.0.0.0 main:app

Hi, I’m David, a Python developer at Kraken Technologies. I work on Kraken: a Python application which has, at last count, 27,637 modules. Yes, you read that right: nearly 28k separate Python files - not including tests. I do this along with 400 other developers worldwide, constantly merging in code. And all anyone needs to make a change - and kick start a deployment of the software that runs 17 different energy and utility companies, with many millions of customers - is one single approval from a colleague on Github.

Now you may be thinking this sounds like a recipe for chaos. Honestly, I would have said the same. But it turns out that large numbers of developers can, at least in the domain we work in, work effectively on a large Python monolith. There are lots of reasons why this is possible, many of them cultural rather than technical, but in this blog post I want to explain about how the organisation of our code helps to make this possible.

Where do your unit tests live? Does is vary, depending on project size? Do you like a flat structure, with test files living alongside everything else? Are you a nested folders person?

I'm curious the practice of others, because I still don't feel like I've found a testing directory structure that satisfies me.

I created a discord bot which fetches memes from lemmy. I'm still learning, looking to get some ideas from the community!

I'm getting errors with this function:

def compare_dates(date1: str, date2: str) -> str:
    date1_obj = datetime.strptime(date1, "%Y-%m-%dT%H:%M:%S")
    date2_obj = datetime.strptime(date2, "%Y-%m-%dT%H:%M:%S")
    return date1 if date1_obj > date2_obj else date2

Because the input sometimes includes microseconds. Is there a clearer way of dealing with this than what I've done?

def compare_dates(date1: str, date2: str) -> str:
    date_format = "%Y-%m-%dT%H:%M:%S"
    date1_obj = datetime.strptime(date1.split(".")[0], date_format)
    date2_obj = datetime.strptime(date2.split(".")[0], date_format)
    date1_obj = date1_obj.replace(microsecond=0)
    date2_obj = date2_obj.replace(microsecond=0)
    return date1 if date1_obj > date2_obj else date2

To be clear, this was released on 11 July 2023.