報錯： SyntaxError: Non-ASCII character

概意思是，默認文件是ASCII格式，需要更改文件編碼，操作是在文件首行加上

#!/usr/bin/python
# -*- coding:utf8 -*-

報錯 ：TypeError: unicode argument expected, got ‘str‘

if your environment is Python2.7, you can change code :
import io
and
output_stream·=io.StringIO()

to
from io import BytesIO as StringIO
output_stream·= StringIO()

報錯：RuntimeError: Invalid DISPLAY variable

import matplotlib.pyplot as plt 後面加一行：
plt.switch_backend(‘agg‘)

中文註釋報錯 SyntaxError: Non-ASCII character