====== Install Python 3.8.2 for Centos ======
----
It will guide you compiling and install Python 3.8.2 on Centos.

===== 1. Prepare and install third-party librarys =====

  yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make
  yum install libffi-devel -y
  yum install wget -y
===== 2. Install Python3.8.2 =====

  # Create new directory
  sudo mkdir /usr/local/python3
  
  # Download 3.8.2 (Install wget if necessary. yum install wget)
  wget --no-check-certificate https://www.python.org/ftp/python/3.8.2/Python-3.8.2.tgz
  or
  wget --no-check-certificate https://www.xinsi.ltd/download/Python-3.8.2.tgz   (local server, maybe higher speed)
  
  # Uncompress and compile
  tar xzvf Python-3.8.2.tgz
  cd Python-3.8.2
  ./configure --prefix=/usr/local/python3
  sudo make && sudo make install
  
  # Create link to app
  sudo ln -s /usr/local/python3/bin/python3 /usr/bin/python3
  sudo ln -s /usr/bin/python3 /usr/bin/python
  
  # Verify installation
  python3 -V
  
  You Can Get:
  
  Python 3.8.2

===== 3.Install pip =====

Solution 1 :

  # get installation script get-pip.py and run it.
  curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
  
  # start installation
  sudo python3 get-pip.py
   
  # Create link to application
  sudo ln -s /usr/local/python3/bin/pip /usr/bin/pip3
  sudo ln -s /usr/bin/pip
  
  # Verify installation
  pip3 -V
    
  # You Should Get
  pip 20.0.2 from /usr/local/python3/lib/python3.8/site-packages/pip (python 3.8)
  
  
Or : \\

Solution 2 :

You can use the pip comes along with python, and update to the latest version

  sudo python3 -m pip install --upgrade pip --force-reinstall   (Maybe slow and timeout, retry)
  sudo ln -s /usr/local/python3/bin/pip /usr/bin/pip3
  
  python3 -m pip -V
  or
  pip3 -V