pickledb 将列表附加到 python

如何解决pickledb 将列表附加到 python

对于课程站点（使用flask 创建），我创建了一个json 数据库，我正在使用main.py 中的pickleDB 访问该数据库。

这是我的 course.json 的样子：

{
  "Course A": 
  {"Student1": 
  {
    "grade":"","distribution":"","timezone":"","rank":"",},"Student2":
  {
    "grade":"",}
  },"Course B": 
  {"Student1": 
  {
    "grade":"",}
  }
}

我已经添加了所有必要的导入并设置得很好。现在，从一个表单中，我请求了数据（对于一个新学生），我想将它添加到课程 A，我已经使用了 pickleDB 的附加功能，如下所示：

  course.append(courseName,{username: 
  {
    "grade":userGrade,"distribution":userdistribution,"timezone":userTimezone,"rank":userRank,}
  }
    )

但是，当我这样做时，会出现错误。这是错误：

[2021-06-17 08:59:08,203] ERROR in app: Exception on /admin/assign [POST]
Traceback (most recent call last):
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/flask/app.py",line 2447,in wsgi_app
    response = self.full_dispatch_request()
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/flask/app.py",line 1952,in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/flask/app.py",line 1821,in handle_user_exception
    reraise(exc_type,exc_value,tb)
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/flask/_compat.py",line 39,in reraise
    raise value
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/flask/app.py",line 1950,in full_dispatch_request
    rv = self.dispatch_request()
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/flask/app.py",line 1936,in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "main.py",line 398,in courseAdd
    course.append(courseName,File "/opt/virtualenvs/python3/lib/python3.8/site-packages/pickledb.py",line 151,in append
    self.db[key] = tmp + more
TypeError: unsupported operand type(s) for +: 'dict' and 'dict'

我不知道为什么会出现错误，我也参考了 pickleDB 文档：https://patx.github.io/pickledb/commands.html

/凹凸

解决方法

尝试使用

a = dict(list(data1.items()) + list(data2.items()))
print(a)

以数据为pickle db数据。