#Python-Setup  #Python  
# Topic covered
Python different version installation in 2 ways
* By - Building Python from Source
* Using deadsnakes PPA (For Latest Python Versions)

Pip installation

1. Python installation

Way 1 - Building Python from Source

Update the packages list and install the packages necessary to build Python source

sudo apt update
sudo apt install build-essential zlib1g-dev libncurses5-dev libgdbm-dev libnss3-dev libssl-dev libreadline-dev libffi-dev libsqlite3-dev wget libbz2-dev
sudo apt-get install -y make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev libncursesw5-dev xz-utils tk-dev libffi-dev liblzma-dev libgdbm-dev libnss3-dev libedit-dev libc6-dev

# Download source code using wget command
# wget https://www.python.org/ftp/python/3.7.4/Python-3.7.4.tgz
wget https://www.python.org/ftp/python/3.6.10/Python-3.6.10.tgz

# Extract
tar -xf Python-3.6.10.tgz

# Install
sudo cp -r Python-3.6.10 /opt
cd /opt/Python-3.6.10
sudo ./configure
sudo ./configure --enable-optimizations # optional
sudo make
sudo make install

Way 2 - Using deadsnakes PPA (For Latest Python Versions)

Start by updating the packages list and installing the prerequisites

sudo apt update
sudo apt install software-properties-common

Next, add the deadsnakes PPA to your sources list

sudo add-apt-repository ppa:deadsnakes/ppa

Once the repository is enabled, install Python 3.6

sudo apt install python3.6
python3.6 --version

Issue that may occur

sudo apt-get install build-essential

fatal error: Python.h: No such file or directory

sudo apt-get install python3-dev
sudo apt install libpython3.7-dev

2. Pip installation

# Install pip3
sudo apt install python3-pip

# Change default
alias pip=pip3

# pip for Python3.7
python3.7 -m pip install pip

# See Version
pip --version