Python/Pandas - If last X instances = 0 then Y

I have a dataframe that has user IDs, which week they've logged on and how many sessions they had during that week. It looks similar to this:

ID	Week	Sessions
1	1	1
1	2	10
1	3	0
1	4	0
1	5	0
1	6	1
2	1	5
2	2	7
2	3	9
2	4	1
2	5	0
2	6	3
2	7	2
3	1	8
3	2	2
3	3	0
3	4	0
3	5	0
3	6	0
3	7	0

I am looking to find out if a user has churned. Churn here is if in the last 3 weeks of a user's lifetime, they haven't had any session. In the example above it means that only user 3 churned (as the first user had a session at their last week).

Ideally the dataframe would look like this:

ID	Week	Sessions	Churn Session	Churned_user
3	1	8	0	1
3	2	2	0	1
3	3	0	0	1
3	4	0	0	1
3	5	0	1	1
3	6	0	0	1
3	7	0	0	1

How can I replicate the above?

Thank you.

source https://stackoverflow.com/questions/72942831/python-pandas-if-last-x-instances-0-then-y

Comments

Why is my reports service not connecting?

I am trying to pull some data from a Postgres database using Node.js and node-postures but I can't figure out why my service isn't connecting. my routes/index.js file: const express = require('express'); const router = express.Router(); const ordersCountController = require('../controllers/ordersCountController'); const ordersController = require('../controllers/ordersController'); const weeklyReportsController = require('../controllers/weeklyReportsController'); router.get('/orders_count', ordersCountController); router.get('/orders', ordersController); router.get('/weekly_reports', weeklyReportsController); module.exports = router; My controllers/weeklyReportsController.js file: const weeklyReportsService = require('../services/weeklyReportsService'); const weeklyReportsController = async (req, res) => { try { const data = await weeklyReportsService; res.json({data}) console...

How to show number of registered users in Laravel based on usertype?

i'm trying to display data from the database in the admin dashboard i used this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count(); echo $users; ?> and i have successfully get the correct data from the database but what if i want to display a specific data for example in this user table there is "usertype" that specify if the user is normal user or admin i want to user the same code above but to display a specific usertype i tried this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count()->WHERE usertype =admin; echo $users; ?> but it didn't work, what am i doing wrong? source https://stackoverflow.com/questions/68199726/how-to-show-number-of-registered-users-in-laravel-based-on-usertype

The number of nodes and edges I calculated manually and by a method provided by networkx library dont match

I am trying to analyse a graph using networkx library in Python. I have implemented a function that returns the nodes and edges of that graph. After that I counted the number of nodes and edges by implementing the len() function for nodes and edges, which gave me 17 for both nodes and edges. However, when I used the method graph.number_of_nodes() of networkx library it gave me 53. My code: import pandas as pd import networkx as nx import matplotlib.pyplot as plt header_list = ["a","b","w"] E =pd.read_csv("aves-barn-swallow-contact-network.edges",sep=" ",header= None,names=header_list) # print(E.head()) # prints first few rows of the csv file G = nx.from_pandas_edgelist(E,"a","b",["w"]) nx.draw(G) plt.show() class GraphAnalyse: #finding nodes and edges def nodeEdge(self,Graph): nodes = Graph.nodes() edges = Graph.edges() ...

StacksPedia

Search This Blog