new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  import json
  import pip
  import os
  
  def err(msg):
      print "\033[31m✗ \033[0m%s" % msg
  
  def ok(msg):
      print "\033[32m✓ \033[0m%s" % msg
  
  def main():
      cwd = os.path.dirname(os.path.realpath(__file__))
      json_file = os.path.join(cwd, 'dependencies.json')
      if os.path.isfile(json_file) == False:
          err("dependencies.json not found in current folder")
  
      with open(json_file) as data_file:
          data = json.load(data_file)
  
      dependencies = data["dependencies"]
      for lib in dependencies:
          command = pip.commands.install.InstallCommand()
          opts, args = command.parser.parse_args()
          requirements_set = command.run(opts, [lib])
          requirements_set.install(opts)
  
      ok("Successfuly installed mising dependencies")
  
  if __name__ == "__main__":
      main()
  
subject: add check