Python

Links

• Force restart faild Gunicor service
• Cookiecutter Django
• Django language codes
• All language codes
• Django reverse Many2Many inline admin
• Django <=> Python
• Django value sensitive unique together
• DRF serialzer write only fields
• Locale error: unsupported locale setting
• Locale problem in Docker
• Celery timezone types
• Python date types
• Convert Python file to .exe
• Time complexity (big O)
• Number of Gunicorn workers in Kubernetes
• 3rd-party Python profiler
• Clean code python book
• FastAPI & Poetry standard Dockerfile
• Bypass Cloudflare protection

File

• Open modes:

  

• Open modes decision tree:

  

Class & Function

• Get full path:

  import os
  import inspect
  
  def foo():
    pass
  
  print(os.path.abspath(inspect.getfile(foo)))
  
  class Bar:
    pass
  
  print(os.path.abspath(inspect.getfile(Bar.__class__)))
  

Modules & Packages

• Get all import able modules & packages:

  import pkgutil
  search_path = ['.'] # set to None to see all modules importable from sys.path
  all_modules = [x[1] for x in pkgutil.iter_modules(path=search_path)]
  print(all_modules)
  

Celery

• Kill celery process:

  kill -9 $(ps aux | grep celery | grep -v grep | awk '{print $2}' | tr '\n' ' ') > /dev/null 2>&1
  

• View worker logs:

  celery -A <worker name: karestoon> worker --loglevel=info
  

PIP

• Install from source (Unix path):

  pip install file:///path/to/package
  

Operators

• Overview

  

• The "i" symbol means "in place"

• The "a" symbol means "asynchronous"
• The "r" symbol means "reverse"
• When we are implementing the "Rich comparison" method we should return a new object, in the other hand for the "Augmented assignment arithmetic" method we should update the current object

Other

• cProfile example: