code: def render_template(template_name, info, out_path=None):
      
  
      env = Environment(loader=PackageLoader('iotile.build', 'config/templates'),
                        trim_blocks=True, lstrip_blocks=True)
  
      template = env.get_template(template_name)
      result = template.render(info)
  
      if out_path is not None:
          with open(out_path, 'wb') as outfile:
              outfile.write(result.encode('utf-8'))
  
      return result
docs: Render a template using the variables in info.
  
      You can optionally render to a file by passing out_path.
  
      Args:
          template_name (str): The name of the template to load.  This must
              be a file in config/templates inside this package
          out_path (str): An optional path of where to save the output
              file, otherwise it is just returned as a string.
          info (dict): A dictionary of variables passed into the template to
              perform substitutions.
  
      Returns:
          string: The rendered template data.