"E: Package 'ipython' has no installation candidate" while trying to install torch

I'm trying to install torch on Ubuntu 20.04.1 LTS
When I run

cd ~/torch; bash install-deps; 

it generates this error:

Package ipython is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'ipython' has no installation candidate 

How do I install ipython?

3 Answers

If you already have pip installed on your machine, ipython can be installed like this:

pip3 install ipython 

If pip is not installed, you’ll need to do this first:

sudo apt install -y python3-pip 

That should give you what you need.

First solution(via apt): The newest ipython deb version download:

Then install it via apt:

sudo apt install /dir/to/ipython_5.8.0-1_all.deb 

NOTE:

I think it's not the best solution, but it is worth a try.

Second solution via apt(easy):

sudo apt install python3-ipython 

Run:

sudo nano /etc/apt/sources.list 

And add these lines.

deb bionic main universe deb bionic-security main universe deb bionic-updates main universe 

Press Ctrl+O to save the file. Press Ctrl+X to quit nano.