ipython3 software package provides Enhanced interactive Python 3 shell, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install ipython3
ipython3 is installed in your system.
Make ensure the ipython3 package were installed using the commands given below,
$ sudo dpkg-query -l | grep ipython3 *
You will get with ipython3 package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Python |
| Package | ipython3 |
| Version | 5.1.0-2 |
| Description | Enhanced interactive Python 3 shell |
| Sub Section | Python |