data_example.json

{
    "_id" : ObjectId("57a1b5040d1bce971242995a"),
    "videos" : {
        "201629" : {
            "list" : [ 
                "54cc7835abc5bbb971f99be0", 
                "54cc783eabc5bbb971f99be1", 
                "54d300a49ca3a7f10f5e84ad", 
                "54d1ee8393ada5bf333e9e8b", 
                "54d304139ca3a7f10f5e868b", 
                "54d305fb9ca3a7f10f5e8801", 
                "565fe85f57da889d4091615c", 
                "54d313389ca3a7f10f5e90f9", 
                "565febaf57da889d40916194", 
                "54cc776dabc5bbb971f99bd4", 
                "54d316a99ca3a7f10f5e92a5", 
                "54d3189e9ca3a7f10f5e9468"
            ],
            "pv" : 38
        }
    },
    "type" : "device",
    "activatedWeeks" : [ 
        "201629"
    ],
    "semester" : "undefined",
    "practices" : {
        "201629" : {
            "list" : [ 
                "54c708798bac81fccbd4bbd5", 
                "54c708798bac81fccbd4bbd8", 
                "565fe7f057da889d40916159", 
                "54c708798bac81fccbd4bbdc", 
                "565fe7f157da889d4091615a", 
                "54cc776dabc5bbb971f99bd4", 
                "54c708798bac81fccbd4bbe6"
            ],
            "pv" : 10
        }
    },
    "role" : "student",
    "from" : "android",
    "id" : "000000357900265",
    "activationWeek" : "201629"
}

time_week_conversion.py

import datetime

cur = datetime.datetime.now()
print(cur)
x = cur.strftime("%Y%W")
print(x)

y = "201619"
x = datetime.datetime.strptime(y, "%Y%W")
print(x)

user_weekly_cache.py

from pymongo import MongoClient

db = MongoClient('10.8.8.111:27017')['ronfedb']['weeklyCache']

user_weekly_cache_schema = {
    "id": str, #id of the account, "_id" for user, "device" for device
    "type": str, #type of the account, "user" for registrated users, "device" for activated devices
    "activationWeek": str, #Week of registration/activation date formatted by %Y%W
    "activatedWeeks": [str], #List of weeks of being active formatted by %Y%W
    "semester": str, #"unknown" for device account, and actual semester for user account (default "七年级上")
    "role": str, #"student" for device account, and actual role for user account
    "from": str, #os for device account, and actual from for user account
    "hasRoom": bool, # only user has this field, True if a user had joined at least one room
    "videos": {
        "201619": { #key is the week formatted by %Y%W
            "pv": int, #PV of startVideo by that user in that week since 3.5
            "list": [str] #List of the string video id started by that user in that week since 3.5
        }    
    },
    "practices": {
        "201619": { #key is the week formatted by %Y%W
            "pv": int, #PV of startPractice by that user in that week since 3.5
            "list": [str] #List of the string topic id started by that user in that week since 3.5
        }    
    }
}