cython3 command not found

Introduction

When you run more command in linux terminal / console, you get the following error message

cython3: command not found

or when using sudo you get the following error message

sudo: cython3: command not found

Solutions to cython3: command not found

How To Fix cython3: command not found in Ubuntu / Debian / Kali Linux / Raspbian

In Ubuntu cython3 is provided by cython3 package.

cython3 is:

Cython is a language that makes writing C extensions for the Python language as easy as Python itself. Cython is based on the well-known Pyrex, but supports more cutting edge functionality and optimizations.

The Cython language is very close to the Python language, but Cython additionally supports calling C functions and declaring C types on variables and class attributes. This allows the compiler to generate very efficient C code from Cython code.

This makes Cython the ideal language for wrapping external C libraries, and for fast C modules that speed up the execution of Python code.

To fix this problem, we can install more using the command below.

sudo apt-get -y install cython3

This command might take some time to finish depending on your machine internet connection.

You can also use apt command to install cython3.

sudo apt -y install cython3

Or if you have aptitude installed you can use the following command.

sudo aptitude install cython3

Summary

In this tutorial we learn how to fix cython3 command not found error in Ubuntu / Debian / Kali Linux or Raspbian distribution.