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PyCharm 中文 字符 python 报错 的 完美 解决方案！

#_*_ coding:utf-8_*_

https://www.python.org/dev/peps/pep-0263/

到python 的官网看了一下，找到了问题的根本原因！

1. python 默认使用 ASCII 作为标准编码格式；

2. python 指定字符编码格式的时候，必须使用以下3种方式之一：

   （不同系统，不同编辑器，可能不同，都实验一下就能找到了！）

   # coding=<encoding name>

   或

   #!/usr/bin/python

   # -*- coding: <encoding name> -*-

   或

   #!/usr/bin/python

   # vim: set fileencoding=<encoding name> :

3. 一定要把 指定编码格式的语句放在.py文件的第一/第二行，

   因为python 文件的第一/第二行必须要满足这个regular expression "^[ v]*#.*?coding[:=][ ]*([-_.a-zA-Z0-9]+)"
   

只要严格遵守以上的3点要求，就可以从根本上解决中文输出是报错的问题了！

demo:

第一种：
# coding= utf8


第二种：
#!/user/bin/python
# _*_coding: utf8 _*_


第三种：
#!/user/bin/python
# vim: set filecoding=utf8 :

https://www.python.org/dev/peps/pep-0263/

Defining the Encoding （注意 空格）

    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> :

    More precisely, the first or second line must match the regular
    expression "^[ 	v]*#.*?coding[:=][ 	]*([-_.a-zA-Z0-9]+)".
    The first group of this
    expression is then interpreted as encoding name. If the encoding
    is unknown to Python, an error is raised during compilation. There
    must not be any Python statement on the line that contains the
    encoding declaration.  If the first line matches the second line
    is ignored.

    To aid with platforms such as Windows, which add Unicode BOM marks
    to the beginning of Unicode files, the UTF-8 signature
    'xefxbbxbf' will be interpreted as 'utf-8' encoding as well
    (even if no magic encoding comment is given).

    If a source file uses both the UTF-8 BOM mark signature and a
    magic encoding comment, the only allowed encoding for the comment
    is 'utf-8'.  Any other encoding will cause an error.

Examples

    These are some examples to clarify the different styles for
    defining the source code encoding at the top of a Python source
    file:

    1. With interpreter binary and using Emacs style file encoding
       comment:

          #!/usr/bin/python
          # -*- coding: latin-1 -*-
          import os, sys
          ...

          #!/usr/bin/python
          # -*- coding: iso-8859-15 -*-
          import os, sys
          ...

          #!/usr/bin/python
          # -*- coding: ascii -*-
          import os, sys
          ...

    2. Without interpreter line, using plain text:

          # This Python file uses the following encoding: utf-8
          import os, sys
          ...

    3. Text editors might have different ways of defining the file's
       encoding, e.g.

          #!/usr/local/bin/python
          # coding: latin-1
          import os, sys
          ...

    4. Without encoding comment, Python's parser will assume ASCII
       text:

          #!/usr/local/bin/python
          import os, sys
          ...

    5. Encoding comments which don't work:

       Missing "coding:" prefix:

          #!/usr/local/bin/python
          # latin-1
          import os, sys
          ...

       Encoding comment not on line 1 or 2:

          #!/usr/local/bin/python
          #
          # -*- coding: latin-1 -*-
          import os, sys
          ...

       Unsupported encoding:

          #!/usr/local/bin/python
          # -*- coding: utf-42 -*-
          import os, sys
          ...

1

__author__ = 'xray'
# coding: utf8

# TempConvert.py
val = input("请输入带温度表示符号的温度值(例如: 32C): ")
if val[-1] in ['C', 'c']:
    f = 1.8 * float(val[0:-1]) + 32
    print("转换后的温度为: %.2fF" % f)
elif val[-1] in ['F', 'f']:
    c = (float(val[0:-1]) - 32) / 1.8
    print("转换后的温度为: %.2fC" % c)
else:
    print("输入有误")

('
'
 '   # elif !== else if
'
 '   #_*_ coding:cp936_*_
'
 '## coding: utf8
'
 '## coding: gbk
'
)

'''
   # elif !== else if
   #_*_ coding:cp936_*_
## coding: utf8
## coding: gbk
'''

demo：

# coding: utf8

# TempConvert.py
val = input("请输入带温度表示符号的温度值(例如: 32C): ")
if val[-1] in ['C','c']:
    f = 1.8 * float(val[0:-1]) + 32
    print("转换后的温度为: %.2fF"%f)
elif val[-1] in ['F','f']:
    c = (float(val[0:-1]) - 32) / 1.8
    print("转换后的温度为: %.2fC"%c)
else:
    print("输入有误")

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