Introduction to Kivy ; A Cross-platform Python Framework

Kivy is a graphical user interface open-source Python library that allows you to develop multi-platform applications on Windows, macOS, Android, iOS, Linux, and Raspberry Pi. The best thing about kivy is, it performs better than HTML5 cross-platform alternatives. 

Note that it is necessary to have Python 3 on your machine to make use of the library.

Installation in Windows: 
 

• Step 1: Update the pip and wheel before installing kivy by entering this command in cmd- 
   

python -m pip install --upgrade pip wheel setuptools

• Step 2: Install the dependencies- 
   

python -m pip install docutils pygments pypiwin32 kivy.deps.sdl2 kivy.deps.glew
python -m pip install kivy.deps.gstreamer
python -m pip install kivy.deps.angle

• Step 3: Install kivy.

python -m pip install kivy

It will result in something like the below image:

Installation in Linux: 
 

• Step 1: Add the PPA by entering this command in terminal- 
   

 sudo add-apt-repository ppa:kivy-team/kivy

• Step 2: Update your package list using your package manager- 
   

sudo apt-get update

• Step 3: Install Kivy 
   

sudo apt-get install python3-kivy

Create an application 

There are three steps of creating an application with kivy:

1. Inherit Kivy’s App class which represents the window for our widgets
2. Create a build() method, which will show the content of the widgets.
3. And at last calling of the run() method. 
    

Example : 
This is python3 code to make a simple application that shows the desired text on the system’s screen:
 

To run this code open cmd(terminal in Linux) and go through the directory in which the code is saved and type this command- 
 

python file_name.py