Tano's questions

Given the following folder layout:

Current_folder
└── FolderA
|   └── CMakeList.txt
|   └── FolderAA
|       └── CMakeList.txt
|
└── FolderB
|   └── FolderBA
|   |   └── CMakeList.txt
|   |   └── FolderBAA
|   |       └── CMakeList.txt
|   |
|   └── FolderBB
|       └── CMakeList.txt
|
└── FolderC
    └── CMakeList.txt
    └── FolderCA
        └── CMakeList.txt

How can I use find (or any other tool) to produce an output similar to:

Current_folder/FolderA/CMakeList.txt
Current_folder/FolderB/FolderBA/CMakeList.txt
Current_folder/FolderB/FolderBB/CMakeList.txt
Current_folder/FolderC/CMakeList.txt

Meaning that the search is stopped after a match with the literal "CMakeLists.txt" for each recursive folder branch respectively.

I am trying to install pyplot as follows:

x@y:~$ sudo -H pip3 install pyplot
Collecting pyplot
  Could not find a version that satisfies the requirement pyplot (from versions: )
No matching distribution found for pyplot

What am I doing wrong?
What conditions doesn't my platform meet?

I'm using Ubuntu 16.04 LTS (64bit).
To provide some further context here are some of my package versions:

x@y:~$ pip3 show pip
Name: pip
Version: 9.0.1
Summary: The PyPA recommended tool for installing Python packages.
Home-page: https://pip.pypa.io/
Author: The pip developers
Author-email: [email protected]
License: MIT
Location: /home/sebastian/.local/lib/python3.5/site-packages
Requires: 

x@y:~$ pip3 show matplotlib
Name: matplotlib
Version: 2.1.2
Summary: Python plotting package
Home-page: http://matplotlib.org
Author: John D. Hunter, Michael Droettboom
Author-email: [email protected]
License: BSD
Location: /usr/local/lib/python3.5/dist-packages
Requires: six, pyparsing, numpy, python-dateutil, pytz, cycler