Python异常002：SyntaxError: (unicode error) 'utf-8' codec can't decode byte 0xbc in position 0: invalid

报错日志：

SyntaxError                               Traceback (most recent call last)
F:\XXX\lib\site-packages\IPython\core\interactiveshell.py in safe_execfile(self, fname, exit_ignore, raise_exceptions, shell_futures, *where)
   2721                     fname, glob, loc,
-> 2722                     self.compile if shell_futures else None)
   2723             except SystemExit as status:

F:\XXX\lib\site-packages\IPython\utils\py3compat.py in execfile(fname, glob, loc, compiler)
    167         compiler = compiler or compile
--> 168         exec(compiler(f.read(), fname, 'exec'), glob, loc)
    169 

SyntaxError: (unicode error) 'utf-8' codec can't decode byte 0xbc in position 0: invalid start byte (metrics.py, line 2)

During handling of the above exception, another exception occurred:

UnicodeDecodeError                        Traceback (most recent call last)
<ipython-input-17-68f53d19bb83> in <module>
----> 1 get_ipython().run_line_magic('run', '../playML/metrics.py')
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原因：
我这个电脑不能安装IDE环境，所以我自己用记事本写的Python文件，直接将后缀改为py。此时出现了一个问题，保存文件默认是ANSI编码，Python无法解析，需要将其换成Unicode编码。