Data Science

Data science is an inter-disciplinary field that uses scientific methods, processes, algorithms, and systems to extract knowledge from structured and unstructured data. Data scientists perform data analysis and preparation, and their findings inform high-level decisions in many organizations.

GitHub: https://github.com/topics/data-science
Wikipedia: https://en.wikipedia.org/wiki/Data_science
Related Topics: data-analysis, data-mining, machine-learning, big-data, data-visualization,
Aliases: datasciences, data-science-project, data-science-algorithm,
Last updated: 2026-07-09 00:07:48 UTC
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https://github.com/ekagra-ranjan/Analyze-This-18

(National Rank: 22) Analyze This' 18, American Express Data Science Competition

american-express americanexpress analyze-this boosting-algorithms corelib credit-card cross-validation data-science data-science-challenges data-science-competition ensemble feature-engineering feature-extraction feature-selection gradient-boosting-machine random-forest sklearn svm xgb-classifier xgboost

Last synced: 08 May 2025

https://github.com/tibcosoftware/catalystml

CatalystML is an open source specification for real-time feature processing, purpose built to transform data for machine learning models.

ai artificial-intelligence data-science data-transformation feature-prep machine-learning

Last synced: 19 Jul 2025

https://github.com/andrei-vataselu/data-science-snippets

🧰 Essential EDA and Data Cleaning Helpers for Any DataFrame This collection of functions is designed to accelerate exploratory data analysis (EDA), quickly surface data quality issues, and offer high-level insights into the structure and content of your dataset.

artificial-intelligence data data-science eda feature-engineering hyperparamater-tunning library loading model-evaluation modeling preprocessing python snippets text-processing time-series visualization

Last synced: 10 Mar 2026

https://github.com/ruddra/project-capstone-nyc-fights-pandemic

Capstone Project: Find Best Neighborhood to Fight Pandemic in NYC

coursera covid-19 data-science ibm nyc

Last synced: 02 Mar 2025

https://github.com/anupamaushetti/machine-learning-cw

This includes Machine learning coursework

data-science jupyter-notebook machine-learning pandas python

Last synced: 17 Feb 2026

https://github.com/victoorv/breast_cancer

Mammographic images classification.

breast-cancer breast-cancer-classification classification cnn cnn-classification convnext convnext-tiny convolutional-neural-networks data data-science data-visualization feature-tuning image image-classification mammogram-images mammographic-images neural-network resnet-50 resnet50 transfer-learning

Last synced: 27 Jan 2026

https://github.com/jillmpla/datatropolis_learning_platform_framer

Framer prototype for a gamified learning platform (Datatropolis - Data City), featuring modules, quizzes, and interactive data challenges.

data-science edtech framer gamification gamification-learning learning-project prototype sketching storyboarding urban-planning wireframes

Last synced: 17 Mar 2026

https://github.com/ccsi-toolset/measurement-optimization

Code for Measure This, Not That: Optimizing the Cost and Model-Based Informa- tion Content of Measurements

applied-statistics convex-optimization data-science design-of-experiments pyomo

Last synced: 16 Feb 2026

https://github.com/exasol/transformers-extension

An Exasol extension for using state-of-the-art pretrained machine learning models via the Hugging Face Transformers API.

data-science exasol exasol-integration huggingface-transformers machine-learning transformers

Last synced: 10 Apr 2025

https://github.com/kriss024/Spark

Spark for Data Science and ETL process.

data-science jupiter-notebook machine-learning mllib pyspark spark spark-sql

Last synced: 17 Jul 2025

https://github.com/curso-r/main-r4ds-2

R para Ciência de Dados II

data-science r teaching

Last synced: 26 Mar 2025

https://github.com/dineshpinto/data-aggregator

A high performance solution to analysing millions of incoming data points using JIT, vectorisation and C arrays.

data-science high-performance numpy python

Last synced: 18 Apr 2026

https://github.com/hrbrmstr/2022-10-nycdh

Slides for NYC Data Hackers 2022-10 pres

data-science data-visualization quarto quarto-extension quarto-pub quarto-template quartopub

Last synced: 04 Apr 2025

https://github.com/ersinaksar/world-happiness-report-analysis

WorldHappinessReport

data-science pyspark python visualization world-happiness-rank world-happiness-report

Last synced: 07 Mar 2026

https://github.com/chaitanyac22/customer-segmentation-using-rfm-analysis-for-online-retail

This project uses RFM (Recency, Frequency, and Monetary) segmentation to analyze customer behavior and provide insights for targeted marketing campaigns. By classifying customers based on their purchasing patterns, strategies can be tailored to improve customer retention, drive growth, and maximize the lifetime value of each customer.

customer-segmentation data-analysis data-science data-visualization exploratory-data-analysis marketing numpy pandas python python3 rfm rfm-analysis rfm-segmentation

Last synced: 11 Jun 2025

https://github.com/satyam4229/college-predictor-system

The college predictor system is a Python-based application that utilizes a machine learning model to predict colleges and their corresponding degree programs and branches based on a student's JEE (Joint Entrance Examination) score.

data data-science jupyter-notebook kaggle prediction python

Last synced: 06 Apr 2026

https://github.com/opensourcedoc/ds-golang

Data Science in Golang

computer-science data-science golang golang-package

Last synced: 07 Jul 2025

https://github.com/maastrichtu-ids/dsri-openshift-applications

🔭 DEPRECATED - Applications for the Data Science Research Infrastructure OpenShift cluster at Maastricht University

data-science data-science-research dsri openshift

Last synced: 20 Jan 2026

https://github.com/marlenezw/speech-to-text

Turn any video or audio recording into a written transcript using python

data data-science python speech speech-recognition speech-synthesis speech-to-text

Last synced: 27 Apr 2026

https://github.com/bebofekry/i_care_graduation_project

Graduation Project

ai artificial-intelligence chatbot cnn computer-vision data-analysis data-science deep-learning ecg graduation-project healthcare machine-learning medical medical-imaging natural-language-processing neural-networks nlp pattern-recognition predictive-modeling python

Last synced: 01 May 2026

https://github.com/kapsner/docker_images

docker images for data science

data-science docker docker-image python r

Last synced: 04 May 2025

https://github.com/sd2001/ceol

Data Mining Group project | Spotify Recommendation System

data-mining data-science music recommendation-system spotify-api

Last synced: 11 Apr 2025

https://github.com/subhangisati/identification-of-gemstone-using-mobilenetv2-and-transfer-learning

The project focuses on Identification of various Gemstone. The dataset consists of 87 classes.It shows the whole progress and model used to achieve final accuracy. You will gain knowledge of Computer Vision, The model used are CNN(Convolutional Neural Network), MobileNetV2 and VGGNet,The final model used was transfer learning with model MobileNetV2

artificial-intelligence classification computer-vision convolutional-neural-networks cv2-library data-science deep-learning deep-neural-networks keras-neural-networks keras-tensorflow machine-learning multiclass-image-classification numpy-library pandas-dataframe python scikit-learn seaborn-python tensorflow

Last synced: 06 Mar 2026

https://github.com/rajspeaks/indian-rainfall-prediction-with-machine-learning-approach

Rainfall Analysis & Prediction in India using Machine Learning approach. This project was pre-trained model from where it has been reconstructed. It has been done under the mentor-ship of LinuxWorld Informatics Private Limited.

analysis data-science machine-learning machine-learning-algorithms machinelearning ml prediction-model rajdeep-das rajspeaks

Last synced: 04 Apr 2025

https://github.com/raj-pulapakura/house-prices-prediction-model

Regression model for predicting house prices of residential homes in Ames, Iowa. Dataset contains 79 explanatory variables. Project includes key topics such as dataset cleaning, feature selection/engineering, EDA and applying grid search to find the best model.

ai boosted-trees data-science eda feature-engineering feature-selection prediction-model regression

Last synced: 19 Jun 2025

https://github.com/mcaelanremigio/rubin_variable_star_workflow

Minimal, end-to-end data analysis workflow for identifying candidate variable stars. Demonstrates EDA, variability feature engineering, and ranking logic, derived from methods used in a Vera C. Rubin Observatory project.

adql astronomy astrophysics data-science python time-series

Last synced: 30 Jun 2026

https://github.com/humol-e/graficator

Herramienta para la graficación de datos en tiempo real de manera serial desde distintos sensores con microcontroladores mediante la lectura serial de datos.

data-science graphs microcontroller streamlit

Last synced: 30 Jun 2026

https://github.com/cartesian-school/introduction-to-julia

Learn the fundamentals of the Julia language in this 13-part course using Jupyter Notebook

basic-programming data-science data-structures data-visualization dispatch function functional-programming julia julia-language julia-library julialang jupyter-notebook matrix-factorization multiple-dispatch

Last synced: 30 Apr 2025

https://github.com/cherylisabella/statistics--caret

Training Regression and Classification Models using caret

data data-analysis data-mining data-science datascience dataset r statistics

Last synced: 24 Jun 2025

https://github.com/shogunbanik18/custoseg

Custoseg is an algorithmic Marketing based Project to do Customer Segmentation using KMean Clustering Algorithm and targeted Recommendations based on each segment

data-science kmeans-clustering-algorithm machine-learning unsupervised-machine-learning

Last synced: 08 Jul 2025

https://github.com/hypertrial/honestroles

Clean, filter, label, and rate job description data

data-science jobs jobsearch python

Last synced: 07 Apr 2026

https://github.com/mcaelanremigio/sdsu_undergraduate_os

Statistics: Data Science major at SDSU sharing applied data science projects and leadership work developed alongside my undergraduate studies.

analytics data-science leadership portfolio professional-development python r sas sdsu sql statistics

Last synced: 30 Jun 2026

https://github.com/csfelix/recommendation-system-mba-usp-esalq

✨ Recommendation Systems Using Diverse Techniques ✨

collaborative-filtering content-based-filtering data-science demographic-filtering hybrid-filtering lightfm python recommendation-systems

Last synced: 17 May 2026

https://github.com/jhonsnow456/ml-algorithms

An ongoing repository that contains machine Learning models on various topics which do precise analysis and verification over the given dataset for each model done through data visualization techniques.

data-science practise python visualization

Last synced: 12 Apr 2025

https://github.com/abhijit2505/data-science

This repository containts the projects that I have done along With my Data Science MOOCs from Coursera.

data-science kaggle-dataset logistic-regression-algorithm practice-codes regression-algorithms

Last synced: 19 Jun 2025

https://github.com/md-emon-hasan/ml-project-intrusion-detection-systems-anomaly-detection-with-ml-dl

🔒 Leverages Machine Learning and Deep Learning models to identify malicious activities in network traffic, enhancing cybersecurity.

anomaly anomaly-detection anomaly-detection-algorithm anomalydetection artificial-intelligence cnn cyber-security data-science deep-learning eda ensemble flask hybrid-model lstm lstm-neural-networks machine-learning ml ml-engineering network-security neural-network

Last synced: 06 Mar 2026

https://github.com/ucsb-library-research-data-services/project-data-management

Good enough practices to manage and preserve your project data

data-management data-preservation data-science data-sharing reproducible-science research-data

Last synced: 06 Apr 2026

https://github.com/thecoderpinar/worldpopulationanalysis2024

World Population Analysis 2024: An In-Depth Exploration of Urban and Rural Populations and Infrastructure Accessibility

data-analysis data-science economic-indicators machine-learning population-growth prophet-forecasting

Last synced: 03 Apr 2025

https://github.com/magnusax/automl

The project aims to develop a customized ML framework on top of existing libraries

data-science machine-learning machine-learning-algorithms machine-learning-library python scikit-learn

Last synced: 20 Jan 2026

https://github.com/bkataru/physics-ia

Programs and files written for Astrostatistics for IB Physics IA. Topic: Visualizing and analyzing the habitable zones for 150,000 stars from the hipparcos catalogue.

astronomical-algorithms astronomy astrophysics astrostatistics data-analysis data-science data-visualization matplotlib plotting

Last synced: 07 Jul 2025

https://github.com/phenomsg/restaurant-review-analysis

This project utilizes the power of BERT (Bidirectional Encoder Representations from Transformers) for sentiment analysis

bert-model data-science huggingface natural-language-processing python transformers

Last synced: 16 May 2026

https://github.com/tirendazacademy/multilingual-ner-app

Building a multilingual NER app with HuggingFace, Gradio and Comet

a ai app comet-ml data-science deep-learning gradio huggingface huggingface-transformers machine-learning multilingual named-entity-recognition nlp roberta-model token-classification

Last synced: 08 Sep 2025

https://github.com/geco-bern/esds_book

data-science environmental-science machine-learning

Last synced: 30 Oct 2025

https://github.com/atxtechbro/flightradar24

Advanced Python application leveraging the power of APIs and the pandas library to retrieve and perform in-depth analysis of flight data from Flightradar24. It uncovers insights such as the most common departure and arrival cities, contributing to the field of aviation data science.

api-integration aviation-data data-analysis data-science data-visualization flightradar24-api pandas-library python requests-library web-scraping

Last synced: 21 Mar 2025

https://github.com/helixspiral/ndbc

Golang wrapper for the National Data Buoy Center (NDBC)

data data-science golang government-data ndbc ndbc-buoy-data noaa noaa-api noaa-buoys noaa-data noaa-weather wrapper wrapper-api wrapper-library

Last synced: 14 Jun 2025

https://github.com/cbhihe/visualcity

Multivariate analysis and statistical modeling (with dimensional reduction) of NYC urban life pathologies

bias-detection cluster-analysis correspondence-analysis data-exploration data-science data-visualization dimensionality-reduction geolocation-data google-maps-api independence-tests knn-classification multiple-correspondence-analysis mva principal-component-analysis r

Last synced: 10 Jul 2025

https://github.com/lukanedimovic/table_editor

A simple table data editor, with easily scalable functions and operations & a nice GUI

data data-science formula java parser parsing preprocessing swing tokenizer

Last synced: 04 Apr 2025

https://github.com/sreichl/ds_setup_example

Example project repository to showcase my blog post "A Data Scientist's Guide to a Comprehensive Setup".

conda data-science github jupyterlab reproducibility snakem

Last synced: 30 Apr 2026

https://github.com/smahala02/monte-carlo-simulation

A comprehensive tutorial on Monte Carlo Simulation using Python, demonstrating how random sampling and probabilistic models can be used for various real-world applications, including finance, physics, and engineering.

data-science machine-learning monte-carlo-simulation probability python random-sampling

Last synced: 11 Apr 2025

https://github.com/justabhishek/covid19-dashboard

COVID-19 Dashboard

covid-19 covid19-data dashboard-application data-science data-visualization html-css-javascript machine-learning python3

Last synced: 02 May 2026

https://github.com/maastrichtu-ids/docker-workshop

🐳 Docker Workshop

data-science docker workshop

Last synced: 10 Apr 2025

https://github.com/fabnavarro/sgwt-sure

Data-driven Thresholding in Denoising with Spectral Graph Wavelet Transform.

data-science graph-signal-processing machine-learning statistics

Last synced: 16 Apr 2026

https://github.com/schbenedikt/datamining

Heise (https://heise.de) News Crawler

data data-science heise postgresql web-crawler

Last synced: 10 Apr 2025

https://github.com/mainakverse/dataverse

A genuine career guide in Data Science & Data Analytics

data-science deep-learning machine-learning natural-language-processing statistical-analysis time-series-analysis

Last synced: 10 Jul 2025

https://github.com/yash22222/flask-based-sentiment-analysis-for-product-reviews

"Flask Sentiment Analyzer" is a web app that predicts the sentiment of product reviews using machine learning. Users input text, and the app determines whether it's positive or negative. It aids in decision-making by providing quick insights into customer sentiments.

css data-science f1-score flask flask-application flipcart html js linear-regression machine-learning pkl prediction sentiment-analyser sentiment-analysis

Last synced: 21 Jan 2026

https://github.com/DeutscheAktuarvereinigung/Data_Science_Challenge_2020_Betrugserkennung

In this notebook we take a look at a relevant project that is frequently encountered by insurers: Fraud Detection. For this purpose we use a car data set from a public source and will show the necessary steps to establish an automated fraud detection.

actuarial-modeling betrugserkennung challenge data-science datasciencechallenge fraud-detection frauddetection

Last synced: 20 Jul 2025

https://github.com/jesusgraterol/bitcoin-lightning-network-stats-dataset-builder

The dataset builder script extracts Bitcoin's Lightnining Network statistics through Mempool.space's public API. The data is stored in a .csv file, facilitating its use in data science and machine learning projects.

bitcoin blockchain blockchain-technology data data-science dataset dataset-generation lightning-network machine-learning

Last synced: 16 May 2026

https://github.com/zenwor/table_editor

A simple table data editor, with easily scalable functions and operations & a nice GUI

data data-science formula java parser parsing preprocessing swing tokenizer

Last synced: 22 Jun 2025

https://github.com/thecoderpinar/stellar-sleuth

This repository contains the code and data for the Astronomical Object Classification Project. The project focuses on classifying celestial objects (stars, galaxies, and quasars) based on their spectral characteristics using data from the Sloan Digital Sky Survey (SDSS).

astronomy classification data-science data-visualization galaxy-classification github machine-learning open-source sdss sky-survey space-exploration spectral-analysis

Last synced: 03 Apr 2025

https://github.com/blockchain-data-analytics/bca-queries-cardano

querying the Cardano blockchain data in PostgreSQL

blockchain cardano data-science db-sync mainnet postgresql

Last synced: 09 Jul 2025

https://github.com/mat3ra/periodic-table

Data about chemical elements arranged in JSON format

chemical-elements cheminformatics chemistry data-science materials materials-informatics periodic-table periodic-table-of-elements

Last synced: 30 Jun 2026

https://github.com/elixirnote/elixirext

Powerful Python Data Analysis Toolkit

data-analytics data-science dataframe

Last synced: 27 Mar 2025

https://github.com/ISLA-UH/redpandas

Pandas pipeline for RedVox data

acoustics analysis data-science data-structures-and-algorithms geophysics infrasound libquantum numpy pandas redvox scipy smartphone

Last synced: 09 Jul 2025

https://github.com/hmeleiro/alquilermad

Housing rent map in Comunidad de Madrid / Mapa del alquiler en la Comunidad de Madrid

data data-science data-visualization datascience housing-location-visualization rent renting

Last synced: 13 Sep 2025

https://github.com/benitomartin/benitomartin

Personal profile 😎

anaconda artificial-intelligence aws bash-script bigquery data-science gcp lambda-functions large-language-models linux machine-learning python pytorch retrieval-augmented-generation sagemaker scikit-learn tensorflow terraform

Last synced: 12 Apr 2025

https://github.com/viadee/nexus-x-ray

Data analysis tooling - What is my nexus server actually doing?

data-science nexus r

Last synced: 10 Sep 2025

https://github.com/urbanadventurer/lyricmind

LyricMind is a comprehensive system designed for fetching, caching, and analyzing song lyrics. It integrates multiple lyrics providers, utilizes language models for in-depth lyrical analysis, and offers both a Command Line Interface (CLI) and a RESTful API for interaction.

ai-for-good cbt chatgpt cli content-moderation data-science langchain llm lyricmind lyrics-analysis machine-learning mental-health music music-therapy natural-language-processing nlp openai python rest-api spotify-api

Last synced: 10 Sep 2025

https://github.com/sam-92/telegramanalyticsbot

This Telegram bot is designed to automate the processing and analysis of time series data. It manages missing values, resamples data to an hourly resolution, and provides basic statistical analysis. The bot is especially beneficial for users engaged with time series datasets, particularly the ENTSO-E dataset.

data-analytics data-science entso-e telegram-bot telegram-bot-api telegram-bots timeseries-analysis

Last synced: 07 Sep 2025

https://github.com/bhrzali/breast_cancer_classification

breast-cancer-prediction breast-cancer-wisconsin classification data-science r

Last synced: 09 Jul 2025

https://github.com/csinva/imodels-playground

Demos for visualizing how rule-based models work.

ai data-science imodels interpretability machine-learning rules xai

Last synced: 21 Jul 2025

https://github.com/moindalvs/resume_classification

Business objective- The document classification solution should significantly reduce the manual human effort in the HRM. It should achieve a higher level of accuracy and automation with minimal human intervention

classification classification-algorithm data-science docx docx2txt ensemble-machine-learning pdfplumber resume-app resume-parser text-analysis text-classification text-mining text-processing textract

Last synced: 24 Apr 2026

https://github.com/darkeyes/mrreg

The framework for finding multiresolution partitions that have homogeneous linear models from multiresolution dataset.

data-science minimum-description-length multiresolution r regression-analysis

Last synced: 04 Apr 2025

https://github.com/johntocci/nullaxe

Nullaxe is a powerful and user-friendly Python library designed for cleaning and preprocessing data. It works seamlessly with both pandas and polars DataFrames, making it a versatile tool for data scientists and developers.

data data-analysis data-science datacleaning pandas polars python

Last synced: 06 Apr 2026

https://github.com/milanowicz/covid-19-dataset

Corona COVID-19 Dataset

coins-data corona coronavirus covid-19 covid-data data-science dataset finance-data jhu johns-hopkins-university rki robert-koch-institut

Last synced: 17 Mar 2025

https://github.com/gallillio/data_science-data_visualizer_tool

## About Supervised ML Helper is a Python application that streamlines exploratory data analysis (EDA) and preprocessing for supervised machine learning. Featuring a user-friendly Tkinter interface, it enables users to load CSV files, visualize data, and perform essential transformations, making data preparation accessible for all skill levels.

data-analysis data-science data-visualization matplotlib numpy pandas seaborn sklearn

Last synced: 17 Feb 2026

https://github.com/zachpinto/tools

Personal collection of tools, libraries, and other resources for computational sciences

ai artificial-intelligence data-science landscape machine-learning toolkit tools

Last synced: 17 Feb 2026

https://github.com/ari-s-123/ds-3000-final-project

Predicts consumer behavior in online commerce using Machine Learning Algorithms.

ai classification classification-algorithm classification-model classifier data-science ecommerce jupyter-notebook knn-classifier linear-regression machine-learning machine-learning-algorithms machinelearning ml online-shopping python python3 sklearn sklearn-library

Last synced: 01 May 2026

https://github.com/memair/apps

App Store for Memair

apps appstore data data-science quantified-self

Last synced: 06 Apr 2026

https://github.com/soichiroyamane/gsplot

General-Scientific Plot based on matplotlib 📈

data-science matplotlib plot python science science-research

Last synced: 06 Apr 2026

https://github.com/elipapa/mycv

copy of markdown-cv with my details

bioinformatics computational-biology curriculum-vitae data-science medicine microbiome

Last synced: 11 Apr 2025

https://github.com/nikoshet/exploratory-data-analysis-using-r

Exploratory Data Analysis using R Course Project for M.Sc. 'Data Science and Machine Learning' in NTUA

data data-analysis data-science eda exploratory-data-analysis ggplot2 r

Last synced: 14 May 2026

https://github.com/thecoderpinar/reta

🍃 Explore the world of renewable energy production, analyze historical data, and predict sustainable energy trends. Join us on the journey to a greener future!

arima clean-energy data-analysis data-science data-visualization energy-future forecasting-models innovation renewable-energy sustainability time-series

Last synced: 03 Apr 2025

https://github.com/pavlozt/admintools

data-science mikrotik nat python wireguard zabbix

Last synced: 17 Mar 2025

https://github.com/craigkelly/dmk

A simple build tool for dataflows

automated build-tool data-science golang yaml

Last synced: 14 Jan 2026

https://github.com/fbecerra/fbecerra.github.io

Source code for my website www.fernandobecerra.com

data-analysis data-science data-visualization dataviz interactive-visualizations

Last synced: 20 Mar 2025

https://github.com/marx-wrld/auto-machine-learning-app

This project is a machine learning code that uses Python Streamlit, pycaret, pandas and plotly. This simple web app then allows a user to generate predictions based on his/her uploaded dataset, then also generate a profile report of this dataset and then finally download the built model for his/her use.

data-science machine-learning python

Last synced: 15 May 2026

https://github.com/carcesar/covid

Este repositório que abriga o projeto final da matéria de Visualização de Informação do Mestrado da Emap-FGV

data-science data-visualization map-covid-19

Last synced: 15 Jun 2025

https://github.com/bhavik-jikadara/lgmvip-datascience

LetsGrowMore Virtual Internship Program 2021

data-science jupyter jupyter-notebook machine-learning matplotlib-pyplot numpy pandas python seaborn sklearn

Last synced: 11 Apr 2026

https://github.com/equinor/ml-pitfalls

Material for a short course on pitfalls in machine learning

course-materials data-science machine-learning pitfalls short-course

Last synced: 01 May 2025

https://github.com/emso-exe/churn_clientes_de_banco

Projeto de análise de churn, utilizando machine learning na classificação de dados de clientes que poderão ou não efetuar o encerramento de conta bancária.

analise-de-dados ciencia-de-dados data-analytics data-science dataanalytics kaggle kaggle-dataset machine-learning machinelearning python python-3 python3