PyCharm 中文注释报错 SyntaxError: Non-ASCII character

Python菜鸟今天写程序时加了中文注释，竟然就报错了，头一回碰到注释报错，活久见。

平时看别人代码时，或多或少会碰到中文注释乱码问题，原因是不同文件编码格式，有些文件编码并不能显示中文，如ASCII。而PyCharm对于中文不仅仅是显示乱码问题，而是编译报错。如下

SyntaxError: Non-ASCII character '\xe6' in file TestPy3/t.py on line 19, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details

看看提示的链接 http://python.org/dev/peps/pep-0263/

Defining the Encoding
Python will default to ASCII as standard encoding if no other
encoding hints are given.

To define a source code encoding, a magic comment must
be placed into the source files either as first or second
line in the file, such as:

# coding=<encoding name>

or (using formats recognized by popular editors)

#!/usr/bin/python
# -*- coding: <encoding name> -*-

or

#!/usr/bin/python
# vim: set fileencoding=<encoding name> :

大概意思是，默认文件是ASCII格式，需要更改文件编码，操作是在文件首行加上

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

编译运行，一切正常。