No matching distribution found for matplotlib==3.1.2 (from -r requirements.txt (line 5))

[GitPaean]

Hi, I was trying to setup the environment to use the examples in this book. I am using Ubuntu 16.04.

When I tried the following command,

(env) paean@paean-ws:~/devel/handson-ml$ python3 -m pip install --upgrade -r requirements.txt

I got the following error message.

Collecting jupyter==1.0.0
  Using cached https://files.pythonhosted.org/packages/83/df/0f5dd132200728a86190397e1ea87cd76244e42d39ec5e88efd25b2abd7e/jupyter-1.0.0-py2.py3-none-any.whl
ERROR: Could not find a version that satisfies the requirement matplotlib==3.1.2 (from -r requirements.txt (line 5)) (from versions: 0.86, 0.86.1, 0.86.2, 0.91.0, 0.91.1, 1.0.1, 1.1.0, 1.1.1, 1.2.0, 1.2.1, 1.3.0, 1.3.1, 1.4.0, 1.4.1rc1, 1.4.1, 1.4.2, 1.4.3, 1.5.0, 1.5.1, 1.5.2, 1.5.3, 2.0.0b1, 2.0.0b2, 2.0.0b3, 2.0.0b4, 2.0.0rc1, 2.0.0rc2, 2.0.0, 2.0.1, 2.0.2, 2.1.0rc1, 2.1.0, 2.1.1, 2.1.2, 2.2.0rc1, 2.2.0, 2.2.2, 2.2.3, 2.2.4, 3.0.0rc2, 3.0.0, 3.0.1, 3.0.2, 3.0.3)
ERROR: No matching distribution found for matplotlib==3.1.2 (from -r requirements.txt (line 5))

Anyone saw this before and any suggestions how to overcome it? I am not particular familiar with the pip and how it works.

Thanks.

[GitPaean]

Some update. I installed a Ubuntu 18.04 then tried the command again, it went through fine.

When under Ubuntu 16.04, the option Anaconda went through setup fine, while some version problem related to matplotlib happened. It looks like this code can have a lot of difficulties with Ubuntu 16.04.

I am very new to this code, so I can not give any judgement, just providing some information from my side.