spark 报错：UnicodeEncodeError: ‘ascii‘ codec can‘t encode characters in position 解决方法

pyspark 调用DataFrame.show()进行数据展示，展示的数据存在中文，会报UnicodeEncodeError: 'ascii' codec can't encode characters in position 284-285: ordinal not in range(128)异常。

在.py文件中已指定#coding:utf-8编码，需要更改系统默认编码格式：

import sys
reload(sys)
sys.setdefaultencoding('utf-8')

异常原文如下：

Traceback (most recent call last):
  File "Demo5.py", line 33, in <module>
    read_df.show()
  File "/opt/cloudera/parcels/CDH-5.16.2-1.cdh5.16.2.p0.8/lib/spark/python/lib/pyspark.zip/pyspark/sql/dataframe.py", line 257, in show
UnicodeEncodeError: 'ascii' codec can't encode characters in position 284-285: ordinal not in range(128)