UnicodeDecodeError: 'ascii' codec can't decode byte 0xe5 in position 11: ordinal not in range(128)

<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">在用python画决策树时，运行显示UnicodeDecodeError: 'ascii' codec can't decode byte 0xe5 in position 11: ordinal not in range(128)这个错误，应该是ascii和unicode编码冲突导致，解决方法是添加下面3行代码：</span>
import sys
reload(sys)
sys.setdefaultencoding('utf-8')