code: def convert_dict_to_params(src_dict):
      
      return "&".join([
          "{}={}".format(key, value)
          for key, value in src_dict.items()
      ])
docs: convert dict to params string
  
      Args:
          src_dict (dict): source mapping data structure
  
      Returns:
          str: string params data
  
      Examples:
          >>> src_dict = {
              "a": 1,
              "b": 2
          }
          >>> convert_dict_to_params(src_dict)
          >>> "a=1&b=2"