Issues installing Python3 and Pip in ubuntu in Docker

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1) Download the Ubuntu image

docker pull ubuntu

2) View the image

docker images

3) Run the container

docker run -itd --name ubuntu-test ubuntu

4) Enter the container

sudo docker exec -it ubuntu-test /bin/bash

5) Update source

apt-get update

If you don't do this, you may run into the following problems:

Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package Python

Just run it once

6) Install python3

apt-get install python3

7) Install pip3

 apt-get install python3-pip

8) Testing

pip3 install numpy
Collecting numpy
 Downloading numpy-1.20.1-cp38-cp38-manylinux2010_x86_64.whl (15.4 MB)
   |███████████████████████████████████| 15.4 MB 1.9 MB/s
Installing collected packages: numpy
Successfully installed numpy-1.20.1

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