意外错误：“DataFrame”对象没有属性“select\u dtypes”

Question

我需要将时间序列数据写入XDB。我得到的数据是一个字典列表，有3列datetime，int64和int64。datetime字段作为DataFrame的索引，并尝试使用write\点写入xdb。你知道吗

代码段：

数据：

datad_list = [{'time': datetime.datetime(2012, 12, 29, 21, 3, 5, 203020), 'c': 5456L, 'm': 263L}, {'time': datetime.datetime(2012, 12, 29, 21, 3, 4, 956438), 'c': 5451L, 'm': 263L}, {'time': datetime.datetime(2012, 12, 29, 21, 3, 4, 704390), 'c': 5459L, 'm': 263L}, {'time': datetime.datetime(2012, 12, 29, 21, 3, 4, 451795), 'c': 5476L, 'm': 263L}, {'time': datetime.datetime(2012, 12, 29, 21, 3, 4, 204375), 'c': 5477L, 'm': 263L},

      try:
          df = pd.DataFrame(datad_list, columns=['time', 'c', 'm'])
      except:
          print "Unexpected error:", sys.exc_info()[1]
      df.set_index(pd.DatetimeIndex(df['time']), inplace=True)
      df.drop('time',axis=1,inplace=True)

      print(df)
      client = DataFrameClient(host, port, USER, PASSWORD, DBNAME)
      print("setting data: ")
      try:
          client.write_points(df, DBNAME, protocol='line', time_precision='ms')
      except:
          print "Unexpected error:", sys.exc_info()[1]
      print("Querying data: ")
      result = client.query("select * from pdbase")
      print("Result: {0}".format(result))

输出：

                                  c     m
2012-12-29 21:03:05.203020        5456  263
2012-12-29 21:03:04.956438        5451  263
2012-12-29 21:03:04.704390        5459  263
2012-12-29 21:03:04.451795        5476  263
2012-12-29 21:03:04.204375        5477  263

设置数据：

Unexpected error: 'DataFrame' object has no attribute 'select_dtypes'

写入点正在引发异常

请让我知道我做错了什么。提前谢谢。你知道吗