pyspark 調用DataFrame.show()進行數據展示，展示的數據存在中文，會報UnicodeEncodeError: 'ascii' codec can't encode characters in position 284-285: ordinal not in range(128)異常。
在.py文件中已指定#coding:utf-8編碼，需要更改系統默認編碼格式：
import sys
reload(sys)
sys.setdefaultencoding('utf-8')
異常原文如下：
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)