对于课程站点（使用烧瓶创建），我创建了一个 json 数据库，我正在使用main.py.
这是我的 course.json 的样子：
{
"Course A":
{"Student1":
{
"grade":"",
"distribution":"",
"timezone":"",
"rank":"",
},
"Student2":
{
"grade":"",
"distribution":"",
"timezone":"",
"rank":"",
}
},
"Course B":
{"Student1":
{
"grade":"",
"distribution":"",
"timezone":"",
"rank":"",
},
"Student2":
{
"grade":"",
"distribution":"",
"timezone":"",
"rank":"",
}
}
}
我已经添加了所有必要的导入并将其设置好。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，会引发错误。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
/撞