text: from functools import wraps
  
  def validate_params(valid_options, params):
      """
      Helps us validate the parameters for the request
  
      :param valid_options: a list of strings of valid options for the
                            api request
      :param params: a dict, the key-value store which we really only care about
                     the key which has tells us what the user is using for the
                     API request
  
      :returns: None or throws an exception if the validation fails
      """
      #crazy little if statement hanging by himself :(
      if not params:
          return
  
      #We only allow one version of the data parameter to be passed
      data_filter = ['data', 'source', 'external_url', 'embed']
      multiple_data = [key for key in list(params.keys()) if key in data_filter]
      if len(multiple_data) > 1:
          raise Exception("You can't mix and match data parameters")
  
      #No bad fields which are not in valid options can pass
      disallowed_fields = [key for key in list(params.keys()) if key not in valid_options]
      if disallowed_fields:
          field_strings = ",".join(disallowed_fields)
          raise Exception("{0} are not allowed fields".format(field_strings))
  
  def validate_blogname(fn):
      """
      Decorator to validate the blogname and let you pass in a blogname like:
          client.blog_info('codingjester')
      or
          client.blog_info('codingjester.tumblr.com')
      or
          client.blog_info('blog.johnbunting.me')
  
      and query all the same blog.
      """
      @wraps(fn)
      def add_dot_tumblr(*args, **kwargs):
          if (len(args) > 1 and ("." not in args[1])):
              args = list(args)
              args[1] += ".tumblr.com"
          return fn(*args, **kwargs)
      return add_dot_tumblr
  