I\'ve recently deleted Anaconda and reinstalled python with brew. I\'ve installed everything according to these instructions.
Python works great, and all packages I\
The above answers are probably sufficient, but I wanted to share my experience since I ran into this same problem today and discovered a simple solution. I installed ipython use apt in Ubuntu 18.04 as follows:
sudo apt install python-ipython
Then, the 'ipython' command didn't work and I got the same "Command not found" error mentioned above. The same happened after installed python3-python. However, then I tried 'sudo apt install ipython' and the correct wrappers were installed. I don't know if something similar happens with pip, but that is my experience with apt.