code: def install(cmd, packages):
      
      check_cmd(cmd)
  
      all_pkgs_str = " ".join(all_pkgs)
      print("INSTALLING: " + cmd + " install " + all_pkgs_str)
      subprocess.check_call([cmd, 'install'] + packages)
docs: Installs all packages provided at once
      :param packages:
      :return: