python – How does one use Pytorch (+ cuda) with an A100 GPU?

The bounty expires in 5 days. Answers to this question are eligible for a +100 reputation bounty. Charlie Parker is looking for a more detailed answer to this question. I was trying to use my current code with an A100 gpu but I get this error: —> backend=’nccl’ /home/miranda9/miniconda3/envs/metalearningpy1.7.1c10.2/lib/python3.8/site-packages/torch/cuda/__init__.py:104: UserWarning: A100-SXM4-40GB with CUDA … Read more

python – Tensorflow (Cummulative) Counting, how to call different labels?

I am very new to Python, but need to work with it during my study for a project. We are trying to make a camera scanning system. I have found an amazing code by Tanner Gilbert: https://github.com/TannerGilbert/Tensorflow-2-Object-Counting that does exactly what we want it to do, but to make it fully functional for our project, … Read more

python – PyQT5 and OpenCv2 loading images incorrectly when refreshing

In a nutshell, I currently am trying to load a picture and view it using pyqt5, via QtWidgets.QGraphicsScene. However, after loading the picture, I run some opencv2 commands (canny, gaussian to get some region-of-interest). These region-of-interest are simply XY coordinates. This then breaks the displaying picture — and I get lots of blue screens. The … Read more

python – live output from subprocess command

Executive Summary (or “tl;dr” version): it’s easy when there’s at most one subprocess.PIPEotherwise it’s hard. It may be time to explain a bit about how subprocess.Popen does its thing. (Caveat: this is for Python 2.x, although 3.x is similar; and I’m quite fuzzy on the Windows variant. I understand the POSIX stuff much better.) The … Read more

python – How to convert .json to .ipynb?

Similar as this one which contains answers that don’t work. Here’s a notebook taken from this dataset which I’m trying to convert: {“cell_type”:{“1862f0a6″:”code”,”2a9e43d6″:”code”,”038b763d”:”code”,”2eefe0ef”:”code”,”0beab1cd”:”code”,”9a78ab76″:”code”,”ebe125d5″:”code”,”d9dced8b”:”code”,”86497fe1″:”code”,”e2c8e725″:”code”,”ff7c44ed”:”code”,”0e7c906e”:”code”,”dd0c804a”:”code”,”781bbf3c”:”code”,”bd94f005″:”code”,”62638fba”:”code”,”bb69e88c”:”code”,”6b5664c7″:”code”,”23783525″:”code”,”8522781a”:”code”,”8ca8392c”:”code”,”17ec3fc4″:”code”,”76512d50″:”code”,”a98c5d9f”:”code”,”06365725″:”code”,”59959af5″:”code”,”80151ab7″:”code”,”5bf9ca51″:”code”,”f5504853″:”code”,”9f50dca0″:”code”,”21616367″:”markdown”,”fcb6792d”:”markdown”,”63c26fa2″:”markdown”,”4bb2e30a”:”markdown”,”a6357f7e”:”markdown”,”45082c89″:”markdown”,”77e56113″:”markdown”,”448eb224″:”markdown”,”032e2820″:”markdown”,”8554b284″:”markdown”,”36002912″:”markdown”,”ac301a84″:”markdown”,”23705731″:”markdown”,”1496beaf”:”markdown”,”2e1a5949″:”markdown”,”7e2f170a”:”markdown”,”bfbde93e”:”markdown”,”0d136e08″:”markdown”,”915643b3″:”markdown”,”8ffe0b25″:”markdown”,”8a4c95d1″:”markdown”,”b69a4f9b”:”markdown”,”c3ce0945″:”markdown”,”3eebeb87″:”markdown”,”1ae087ab”:”markdown”,”aaad8355″:”markdown”,”503926eb”:”markdown”,”3e5f860d”:”markdown”},”source”:{“1862f0a6”:”# This Python 3 environment comes with many helpful analytics libraries installedn# It is defined by the kaggle/python Docker image: https://github.com/kaggle/docker-pythonn# For example, here’s several helpful packages to loadnnimport numpy as np # … Read more

python – Deploying a Django application to Heroku – No module named ‘django_project.wsgi

I’m trying to deploy a django application but I keep getting this error: ModuleNotFoundError: No module named ‘django_project.wsgi’ In fact, here’s the full log: 2022-05-13T14:52:06.436735+00:00 app[web.1]: Traceback (most recent call last): 2022-05-13T14:52:06.436735+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.9/site-packages/gunicorn/arbiter.py”, line 589, in spawn_worker 2022-05-13T14:52:06.436736+00:00 app[web.1]: worker.init_process() 2022-05-13T14:52:06.436736+00:00 app[web.1]: File “/app/.heroku/python/lib/python3.9/site-packages/gunicorn/workers/base.py”, line 134, in init_process 2022-05-13T14:52:06.436736+00:00 app[web.1]: self.load_wsgi() 2022-05-13T14:52:06.436737+00:00 app[web.1]: … Read more

Creating a singleton in Python

Use a Metaclass I would recommend Method #2but you’re better off using a metaclass than a base class. Here is a sample implementation: class Singleton(type): _instances = {} def __call__(cls, *args, **kwargs): if cls not in cls._instances: cls._instances[cls] = super(Singleton, cls).__call__(*args, **kwargs) return cls._instances[cls] class Logger(object): __metaclass__ = Singleton Or in Python3 class Logger(metaclass=Singleton): pass … Read more