setup.sh

#!/bin/bash
py=false
pyv=2
python3='py'

if command -v python &>/dev/null
then
    echo "[setup.sh] > Python is installed"
    py=true
    pyv="$(python -V 2>&1)"
    echo "[setup.sh] > Version: $pyv"
else
    echo "[setup.sh] > python not accesible from the script"
fi
if command -v python3 &>/dev/null
then
    echo "[setup.sh] > Python 3 is installed"
    py=true
    pyv="$(python3 -V 2>&1)"
    echo "[setup.sh] > Version: $pyv"
else
    echo "[setup.sh] > python3 command is not accesible from the script"
    # python3='python'
fi
if [ ! $py ]
then
    echo '[setup.sh] > Python not found'
    echo '[setup.sh] > Install using sudo?(Y/n)'
    read installpy
    if [ $installpy == "Y" -o $installpy == "y" -o $installpy == "yes" ]
    then
        echo sudo apt-get install python3 python3-pip
        sudo apt-get install python3 python3-pip
        echo '[setup.sh] > Python is installed'
    else
        echo "[setup.sh] > Please install python3"
    fi
fi
if $py
then
    $python3 -c "import Cryptodome" &>/dev/null
    if [ $? -ne 0 ]
    then
        echo '[setup.sh] > Installing Crypto for python'
        $python3 -m pip install --user pycryptodomex
    fi
    $python3 -c "import requests" &>/dev/null
    if [ $? -ne 0 ]
    then
        echo '[setup.sh] > Installing requests for python'
        $python3 -m pip install --user requests
    fi
    $python3 -c "import hashlib" &>/dev/null
    if [ $? -ne 0 ]
    then
        echo '[setup.sh] > Installing hashlib for python'
        $python3 -m pip install --user hashlib
    fi
    $python3 -m pip install --user -U -r requirements.txt
    $python3 -c "import Cryptodome" &>/dev/null
    if [ $? -ne 0 ]
    then
        echo '[setup.sh] > Installing Cryptodome failed'
    else
        echo '[setup.sh] > Installing Cryptodome successful'
    fi
    $python3 -c "import requests" &>/dev/null
    if [ $? -ne 0 ]
    then
        echo '[setup.sh] > Installing requests failed'
    else
        echo '[setup.sh] > Installing requests successful'
    fi
    $python3 -c "import hashlib" &>/dev/null
    if [ $? -ne 0 ]
    then
        echo '[setup.sh] > Installing hashlib failed'
    else
        echo '[setup.sh] > Installing hashlib successful'
    fi
    echo '[setup.sh] > pycryptodomex, hashlib, requests for python installed'
fi