gistfile1.txt

#!/bin/bash
DPKGS=(python3 python3-pip)
PIPS=(requests datetime)
# check if user running script is root
if [[ "$EUID" != 0 ]]
then
  echo "Please, run this script with superuser privileges."
  exit 1
fi

# check whether dpkg dependencies are installed
for i in "${DPKGS[@]}"
do
  ISINSTALLED=`dpkg-query -W -f='${Status};${Version}\n' "$i" 2>/dev/null | cut -d ';' -f1`
  if [[ "$ISINSTALLED" != "install ok installed" ]]
  then
    sudo apt install -y $i 2>/dev/null 1>&2
    if [[ "$?" -eq 0 ]]
    then
      echo "$i was succesfully installed"
    else
      echo "there was some error when installing $i"
      exit 1
    fi
  fi
done

for i in "${PIPS[@]}"
do
  sudo pip3 install $i 2>/dev/null 1>&2
  if [[ "$?" -eq 0 ]]
  then
    echo "$i was succesfully installed or was already installed"
  else
    echo "there was some error when installing $i"
    exit 1
  fi
done
echo "all dependencies were met, you may run the script"