将sqlContext dataframe转换为pandas datafram时出错

Question

我有一个sqlContext df作为df2。在

在其上运行show命令，将给出以下输出。在

df2.show(5)
+--------------+-----------+-------------------+-------------------+
|          name|    channel|         start_time|           end_time|
+--------------+-----------+-------------------+-------------------+
|  Sohvaperunat|    Yle TV2|2018-04-14 04:07:54|2018-04-14 04:54:38|
|   Sisarvaimot|TLC Finland|2018-04-14 12:25:00|2018-04-14 13:25:00|
|   Sisarvaimot|TLC Finland|2018-04-15 00:55:00|2018-04-15 01:55:00|
|    Onnela (S)|       MTV3|2018-04-15 15:25:00|2018-04-15 15:55:00|
|X Factor Suomi|       MTV3|2018-04-15 19:30:00|2018-04-15 21:00:00|
+--------------+-----------+-------------------+-------------------+
only showing top 5 rows

但是为了便于处理，尝试将其转换为pandas Df，会出现以下错误。在

^{pr2}$

我运行这个的方式有什么错误吗