Programming

Of course, I’m just one of thousands who started building apps using React Native. But whatever, it’s a cool experience.

A cool feature of PyCharm is the fast creating an html template. Create a new file, type html:5, press Tab. That’s all.

About a year ago, I published a web-based task management application written with Flask. It looked like this: Since a year has passed, I decided to rewrite this project in Django, and also try to deploy it to PaaS Heroku. I’ve also made some improvements, including design, authorization, database management, and web security issues. That’s what happened: Links: Try it in live on Heroku GitHub repository

I found out how to use pipenv environment with VS Code from the article “Visual Studio Code, Python and pipenv”. Thanks, Benjamin Pack! I saved the text for myself. First, find out where pipenv has created your virtualenv setup and stashed the python executable you are using. From the command line in your project folder (where your Pipfile is), execute the following: pipenv --py This will give you the full path to your virtualenv python install. For my sample project it was /Users/pack/.local/share/virtualenvs/astra-AQkAm5fD/bin/python ...

I use PyCharm for python projects and pipenv for package management. Start new PyCharm project named django-rest-react-blog Optionally git init clone gist .gitignore for Django and React projects Main course pipenv install django pipenv install djangorestframework pipenv install ipython --dev django-admin.py startproject bookcase cd bookcase python manage.py startapp mainapp Edit bookcase/settings.py: ... INSTALLED_APPS = [ ... 'rest_framework' ] ... TEMPLATES = [ { ... 'DIRS': [BASE_DIR / 'mainapp-ui/build'], ... }, ] ... STATIC_ROOT = BASE_DIR / 'static' STATICFILES_DIRS = ( (BASE_DIR / 'mainapp-ui/build/static'), ) Edit mainapp/views.py: from django.shortcuts import render def index(request): return render(request, 'index.html', {}) Edit bookcase/urls.py: ... from mainapp.views import index urlpatterns = [ ... path('', index) ] make dir mainapp/api with files there: ...

I tried the facial recognition library for Python ageitgey/face_recognition. This library uses dlib, a toolkit written in C++ that contains machine learning algorithms. For example, I’m trying to check if an actor is playing in the TV series “The Big Bang Theory”. A test image with an actor is compared to real actors filmed in a TV show. I wrote a web service that uses python face_recognition library for face recognition from image and compares the recognized face with the data stored in the database. ...

I wrote a traditional application for such kind of training cases in React. This is a simple to-do list. In my app, I don’t use any extensions for state management. Only clean React with state saving in local storage. I spied the main ideas on the Udemy course “React + Redux. Professional development”. But mostly I tried to write the code myself. I would like to dive into React Native a bit and migrate this app to Android. But it depends on the availability of free time. ...

I recently wrote a Python script to log changes in the selected folder. The script has a GUI based on Tkinter, the native Python library. I decide to rewrite this script in the Golang. I only need one executable file that doesn’t require Python installation. Before that, I made an executable file using pyinstaller. But why not try Golang? Apart from Tkinter, I only know a little about the GTK. I used it for a new version of the program written in Golang with a GUI. ...

To develop a GUI app in Windows, I chose the gotk3 package. This is a binding of the GTK lib, which provides a native interface for Windows. I didn’t deal with crosscompiling and installed all the necessary tools in the Windows 10 VM. The VM image is officially distributed by Microsoft. I used the instructions from the wiki to install gotk3. Also I used the Chocolatey to install the necessary tools. For install it: ...

Pyenv pyenv lets you easily install and switch between multiple versions of Python. Install and customization zsh The main issues are described in wiki curl https://pyenv.run | bash echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.zshrc echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.zshrc echo -e 'if command -v pyenv 1>/dev/null 2>&1; then\n eval "$(pyenv init -)"\nfi' >> ~/.zshrc exec $SHELL sudo apt-get update; sudo apt-get install --no-install-recommends make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev xz-utils tk-dev libxml2-dev libxmlsec1-dev libffi-dev liblzma-dev Update pyenv ...