I Failed the Turing Test

All posts in March 2018

Find circular imports in Python

Find circular imports in Python

Posted on Author VintaPosted in Python

What is circular imports?
http://stackabuse.com/python-circular-imports/

You could use python -vv to inspect import relations.

$ python -vv manage.py shell
>>> from api.models import Application
>>> from member.views.site import signup

or

$ python -vv
>>> import os
>>> os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'streetvoice.settings')
>>> import django
>>> django.setup()
>>> from api.models import Application

ref:
https://stackoverflow.com/questions/6351805/cyclic-module-dependencies-and-relative-imports-in-python
https://stackoverflow.com/questions/9098787/tool-for-pinpointing-circular-imports-in-python-django

Python 3.7 has new feature to show time for importing modules. This feature is enabled with -X importtime option or PYTHONPROFILEIMPORTTIME=1 environment variable.

$ python3.7 -X importtime -c "import pipenv"

ref:
https://dev.to/methane/how-to-speed-up-python-application-startup-time-nkf

ngrok: Share your localhost services with friends

ngrok: Share your localhost services with friends

Posted on Author VintaPosted in DevOps

Generate a https://xxx.ngrok.com URL for letting other people access your localhost services.

ref:
https://github.com/inconshreveable/ngrok
https://github.com/localtunnel/localtunnel

Install

Download ngrok from https://ngrok.com/download.

$ unzip ngrok-stable-darwin-amd64.zip && \
sudo mv ngrok /usr/local/bin && \
sudo chown vinta:admin /usr/local/bin/ngrok

$ ngrok --version
ngrok version 2.3.35

Usage

Get your auth token in https://dashboard.ngrok.com/auth.

$ ngrok authtoken YOUR_TOKEN

# open a session to local port 8000
# you can also specify a custom subdomain for the tunnel
$ ngrok http 8000
$ ngrok http -subdomain=vinta-test-server -region=ap 8000
$ open https://vinta-test-server.ap.ngrok.io/

# view ngrok sessions
$ open http://localhost:4040/

ref:
https://ngrok.com/docs