报错总结

django：

返回中文字符串ok，返回json中文乱码

解：json.dumpd(dd,ensure_ascii=False)

 

模板继承报错

解：需要添加路径{%extends ./base.html%}

 

python2.7 unicode和string类型

>>> ss=u'dddd'+'dddddd'
>>> type(ss)
<type 'unicode'>
>>> s='ddd'+'dddd'
>>> type(s)
<type 'str'>
>>>

 

selenium构造report的时候报错

IOError: [Errno 22] invalid mode ('w+') or filename: 'D:\\work\\report\\20180523_15:27:27re.html'

解：因为文件名不能含有特殊符号：，修改文件名格式

 

django models增加一个字段，makemigrations报错

we can't do that (the database needs something to populate existing rows).
Please select a fix:
1) Provide a one-off default now (will be set on all existing rows with a null
value for this column)
2) Quit, and let me add a default in models.py
Select an option: Traceback (most recent call last):

 

解：设置新增字段null=True

age = CharField(max_length=10, null=True)