Python 入门级报错处理

问题1：Missing parentheses in call to 'print'

原因:因为Python2.X和Python3.X不兼容。
我安装的是Python3.X，但是我试图运行的却是Python2.X 的代码。
所以上面的语法在python3中是错误的。在python3中，你需要将print后面的语句加括号，正确的写法：
print ("hello world")

问题2：创建项目报错，django-admin startproject sundyblog
File "c:\users\andy\appdata\local\programs\python\python35-32\lib\site-packages\django\utils\html.py", line 16, in <module>
from .html_parser import HTMLParser, HTMLParseError
File "c:\users\andy\appdata\local\programs\python\python35-32\lib\site-packages\django\utils\html_parser.py", line 12, in <module>
HTMLParseError = _html_parser.HTMLParseError
AttributeError: module 'html.parser' has no attribute 'HTMLParseError'

原因:HTMLParseError在pythons3.5已经没有了

解决方法:

方法1：将python版本回退到3.3或3.4

方法2：升级django版本
>pip3 install django==1.8 ##升级django版本
C:\Users\andy>django-admin startproject sundyblog ##再次执行，无报错

问题3： 使用  ImageField  字段建表报错

C:\Users\andy\sundyblog>python manage.py makemigrations
SystemCheckError: System check identified some issues:

ERRORS:
blog.Article.portal: (fields.E210) Cannot use ImageField because Pillow is not installed.
HINT: Get Pillow at https://pypi.python.org/pypi/Pillow or run command "pip install Pillow".

解决：C:\Users\andy\sundyblog>pip install -i https://pypi.douban.com/simple/ Pillow
Looking in indexes: https://pypi.douban.com/simple/
Collecting Pillow
Downloading https://pypi.doubanio.com/packages/0f/fe/0979c8d6fa0c986e4603e5396904945b44f93ff9e346ee5ffadc7487cff6/Pillow-5.4.1-cp35-cp35m-win32.whl
100% |████████████████████████████████| 1.7MB 351kB/s
Installing collected packages: Pillow
Successfully installed Pillow-5.4.1
You are using pip version 19.0.1, however version 19.0.2 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

C:\Users\andy\sundyblog>python manage.py makemigrations
Migrations for 'blog':
0001_initial.py:
- Create model Article
- Create model Author
- Add field autor to article

C:\Users\andy\sundyblog>