elo | An implementation of the Elo rating system for Python

by sublee Python Version: Current License: Non-SPDX

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | elo Summary

null

An implementation of the Elo rating system for Python

Support

Quality

Security

License

Reuse

Top functions reviewed by kandi - BETA

kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of elo

Get all kandi verified functions for this library.

elo Key Features

No Key Features are available at this moment for elo.

elo Examples and Code Snippets

No Code Snippets are available at this moment for elo.

Community Discussions

Trending Discussions on elo

How to recursively calculate rows based on previous rows in Snowflake?

Global Elo leadeboard with multiple tables

Service timed out: Spreadsheets

Using SQLAlchemy, I need to assign users into pools, and a ranking for each pool they're in

How to maintain order of a Mongo collection by sorting on an indexed field efficiently

JSON serialization of dictionary with complex objects

Firebase - One transaction for 2 paths in real time database

Console output into html file every X seconds

error getting was unix with os.path.getatime

Angular - How to debounce PipeTransform?

QUESTION

How to recursively calculate rows based on previous rows in Snowflake?

Asked 2022-Apr-08 at 21:28

I'm trying to build a performance score on each player in my table and use this to run some analysis. I've tried to use the Elo ranking using the player's score in the game vs themselves in the prior game. The game is a time-trial race so the faster they complete the better their performance. I simulate a win (1) when the current race is faster than their previous race, a loss (0) when it is slower and draw (.5) when the timing difference is 0.

There are two components to Elo's algorithm...the Outcome Estimation for all players (two in my case - Ea, Eb) and the ranking update (Ra, Rb).

I have the current setup to simulate one calculation

...

ANSWER

Answered 2022-Apr-08 at 21:28

So reaping the point that values calculated by this process are meaningless. Here is how you can do it. I stripped the formula down to avoid math errors that occur in the CTE due to ambiguous values selection occurring, which can be avoided but each values needs to only refer to the r or d values and not the prior calculated intermediate values of the "same row"

So with this data:

Source https://stackoverflow.com/questions/71799967

QUESTION

Global Elo leadeboard with multiple tables

Asked 2022-Mar-21 at 18:35

I'm trying to create elo based leaderboard from multiple tables. Table structures are shown down below. What I am looking for is query that would sum elo from all tables into one for every single player that is in any of the tables and then order it desc to get top 10 players with global elo.

players_mode_thebridges

id name elo 1 JesusChrist69 13 2 62MB 196

players_mode_sumo

id name elo 1 JesusChrist69 196

players_mode_boxing

id name elo 1 62MB 723

Does anyone know how to make that work? I am struggling on that problem for quite some time. All I was able to do was get global elo of one specific player but what I need is to get top 10 players. Thanks in advance for answers.

...

ANSWER

Answered 2022-Mar-21 at 18:35

SELECT `name`, SUM(elo) AS elo FROM
(SELECT `name`, `elo` FROM players_mode_boxing
UNION
SELECT `name`, `elo` FROM players_mode_sumo
UNION
SELECT `name`, `elo` FROM players_mode_thebridges) X
GROUP BY `name`
ORDER BY `elo` DESC LIMIT 10

Source https://stackoverflow.com/questions/71561784

QUESTION

Service timed out: Spreadsheets

Asked 2022-Feb-10 at 05:22

I always get the exception: "Exception: Service timed out: Spreadsheets" Why does this happen and would it help to try the method updateSpec(spec)? It always happens when I got to this specific line:

...

ANSWER

Answered 2022-Feb-10 at 05:22

The cause of the error is that you are calling sheet too many times, and each call is a request which takes time to process and ultimately leads to the timeout. The easy sounding solution is reduce the calls of sheet.getRange() and sheet.setValue() and sheet.getName() etc… so that you ideally do them once per each sheet you are working on. A simple example would be as follows, where everything is done once (except the api call, which ideally should also be done using a bulk api).

Source https://stackoverflow.com/questions/71047139

QUESTION

Using SQLAlchemy, I need to assign users into pools, and a ranking for each pool they're in

Asked 2022-Jan-28 at 12:55

Here is the relevant code.

I'm writing a Flask application where users can join pools and compete against others within those pools (currently, pools and users are in a many to many relationship). Each user will need a rating for each pool that he/she is in (Elo Rating), and I'm not sure how to implement that into my existing structure. Any suggestions to implement it that either fit into my solution or change it would be appreciated.

(Right now, each user has a rating but it is shared amongst pools, which does not make sense for Elo)

...

ANSWER

Answered 2022-Jan-28 at 12:55

For me, you should replace association table (pool_user) with association model (UserPool).

Source https://stackoverflow.com/questions/70887197

QUESTION

How to maintain order of a Mongo collection by sorting on an indexed field efficiently

Asked 2022-Jan-10 at 09:50

ObjectId _id  <--- index
String UserName
int Points <--- Descending index

...

ANSWER

Answered 2022-Jan-10 at 09:50

You don't need to sort additionally already created indices , when you create indices in mongoDB you specify in what direction they need to be sorted(ascending(1) or descending(-1)) , so when you search multiple documents based on some field the result will be already sorted based on this field index order. Afcourse you can specify explicitly if you need the result in reverse order or sorted by other field.

Source https://stackoverflow.com/questions/70648893

QUESTION

JSON serialization of dictionary with complex objects

Asked 2022-Jan-08 at 12:16

I am trying to serialize the dictionary playersElo for saving/loading it as/from JSON.

But as it's not a serializable object and I can't find a way to do it.

...

ANSWER

Answered 2022-Jan-08 at 12:16

Maybe this can be a starting spot for you. The serializer grabs the __dict__ attribute from the object and makes a new dict-of-dicts, then writes it to JSON. The deserializer creates a dummy object, then updates the __dict__ on the way in.

Source https://stackoverflow.com/questions/70525815

QUESTION

Firebase - One transaction for 2 paths in real time database

Asked 2021-Dec-22 at 15:03

I have a database with the following structure:

Now two paintings can be rated against each other and the rating is then updated. But it can happen that one painting is rated mutliple times at the same time. Therefore i tried using a nested transaction (see below) to avoid race conditions:

...

ANSWER

Answered 2021-Dec-22 at 15:03

Firebase Realtime Database transactions run against a single path in your database. There is currently no way to run a transaction against multiple path, so the common approach is to run the transaction against the lowest-level shared path (/paintings in your case).

This can indeed lead to more contention as you have more users performing concurrent transactions.

The only alternative I've used at times is to build my own transaction mechanism using:

Multi-path updates, to perform both writes at the same time.
Security rules, to only allow the transition that make sense in my use-case.
Client-side retries, so that contention or outdated data are still handled correctly.

This is fairly non-trivial even for simple cases, and may require changing your data structure and/or adding additional values to each request. But if you get past those hurdles, it will allow you to run a "transaction" across multiple paths.

Source https://stackoverflow.com/questions/70448545

QUESTION

Console output into html file every X seconds

Asked 2021-Nov-04 at 08:56

I have this code in which results get printed in console, and I want to output them into a .html file:

...

ANSWER

Answered 2021-Nov-04 at 08:56

Do you just mean print it to the html page that you are looking at?

You can just put a div on the page where you are running this

"

and then

Source https://stackoverflow.com/questions/69835691

QUESTION

error getting was unix with os.path.getatime

Asked 2021-Oct-08 at 17:08

I want to get the unix era of the file, but I get an error.

Code:

...

ANSWER

Answered 2021-Oct-08 at 04:05

"FileNotFoundError" is the give-away. That means that the file you pass to getatime cannot be found. file is returned by os.walk, so you can be pretty sure it does actually exist, so why can't it be found? Because you need to provide the path to the file, and os.walk only returns the filename.

Try this instead:

Source https://stackoverflow.com/questions/69490284

QUESTION

Angular - How to debounce PipeTransform?

Asked 2021-Sep-29 at 19:25

I am using *ngFor to display a collection, I also have one input which will be used as a filter criteria (this input is a formControl). Now I have added a PipeTransform to filter my collection based on that input. Everything works as expected but I can't figure out how to debounce. I want my filterPipe to be called 0.5s after last keystroke inside input but at the moment it is called instantly after any change inside my input.

HTML:

...

ANSWER

Answered 2021-Sep-29 at 19:09

Working example in Stackblitz

HTML:

Source https://stackoverflow.com/questions/69380335

Community Discussions, Code Snippets contain sources that include Stack Exchange Network