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PyGWalker: A Python Library for Exploratory Data Analysis with Visualization

PyGWalker can simplify your Jupyter Notebook data analysis and data visualization workflow, by turning your pandas dataframe into an interactive user interface for visual exploration.

PyGWalker (pronounced like "Pig Walker", just for fun) is named as an abbreviation of "Python binding of Graphic Walker". It integrates Jupyter Notebook with Graphic Walker, an open-source alternative to Tableau. It allows data scientists to visualize / clean / annotates the data with simple drag-and-drop operations and even natural language queries.

https://github.com/Kanaries/pygwalker/assets/22167673/2b940e11-cf8b-4cde-b7f6-190fb10ee44b

[!TIP] If you want more AI features, we also build runcell, an AI Code Agent in Jupyter that understands your code/data/cells and generate code, execute cells and take actions for you. It can be used in jupyter lab with pip install runcell

https://github.com/user-attachments/assets/9ec64252-864d-4bd1-8755-83f9b0396d38

Visit Google Colab, Kaggle Code or Graphic Walker Online Demo to test it out!

If you prefer using R, check GWalkR, the R wrapper of Graphic Walker. If you prefer a Desktop App that can be used offline and without any coding, check out PyGWalker Desktop.

Features

PyGWalker is a Python library that simplifies data analysis and visualization workflows by turning pandas DataFrames into interactive visual interfaces. It offers a variety of features that make it a powerful tool for data exploration: - ##### Interactive Data Exploration: - Drag-and-drop interface for easy visualization creation.   - Real-time updates as you make changes to the visualization. - Ability to zoom, pan, and filter the data.   - ##### Data Cleaning and Transformation: - Visual data cleaning tools to identify and remove outliers or inconsistencies.   - Ability to create new variables and features based on existing data.   - ##### Advanced Visualization Capabilities: - Support for various chart types (bar charts, line charts, scatter plots, etc.). - Customization options for colors, labels, and other visual elements.   - Interactive features like tooltips and drill-down capabilities.   - ##### Integration with Jupyter Notebooks: - Seamless integration with Jupyter Notebooks for a smooth workflow.   - ##### Open-Source and Free: - Available for free and allows for customization and extension.

Getting Started

Check our video tutorial about using pygwalker, pygwalker + streamlit and pygwalker + snowflake, How to explore data with PyGWalker in Python

| Run in Kaggle | Run in Colab | |--------------------------------------------------------------|--------------------------------------------------------| | | |

Setup pygwalker

Before using pygwalker, make sure to install the packages through the command line using pip or conda.

pip

bash pip install pygwalker

Note

For an early trial, you can install with pip install pygwalker --upgrade to keep your version up to date with the latest release or even pip install pygwalker --upgrade --pre to obtain latest features and bug-fixes.

Conda-forge

bash conda install -c conda-forge pygwalker or bash mamba install -c conda-forge pygwalker See conda-forge feedstock for more help.

Use pygwalker in Jupyter Notebook

Quick Start

Import pygwalker and pandas to your Jupyter Notebook to get started.

python import pandas as pd import pygwalker as pyg

You can use pygwalker without breaking your existing workflow. For example, you can call up PyGWalker with the dataframe loaded in this way:

python df = pd.read_csv('./bike_sharing_dc.csv') walker = pyg.walk(df)

That's it. Now you have an interactive UI to analyze and visualize data with simple drag-and-drop operations.

Cool things you can do with PyGwalker:

• You can change the mark type into others to make different charts, for example, a line chart:

• To compare different measures, you can create a concat view by adding more than one measure into rows/columns.

• To make a facet view of several subviews divided by the value in dimension, put dimensions into rows or columns to make a facets view.

• PyGWalker contains a powerful data table, which provides a quick view of data and its distribution, profiling. You can also add filters or change the data types in the table.

• You can save the data exploration result to a local file

Better Practices

There are some important parameters you should know when using pygwalker:

• spec: for save/load chart config (json string or file path)
• kernel_computation: for using duckdb as computing engine which allows you to handle larger dataset faster in your local machine.
• use_kernel_calc: Deprecated, use kernel_computation instead.

python df = pd.read_csv('./bike_sharing_dc.csv') walker = pyg.walk( df, spec="./chart_meta_0.json", # this json file will save your chart state, you need to click save button in ui mannual when you finish a chart, 'autosave' will be supported in the future. kernel_computation=True, # set `kernel_computation=True`, pygwalker will use duckdb as computing engine, it support you explore bigger dataset(<=100GB). )

Example in local notebook

• Notebook Code: Click Here
• Preview Notebook Html: Click Here

Example in cloud notebook

• Use PyGWalker in Kaggle
• Use PyGWalker in Google Colab

Programmatic Export of Charts

After saving a chart from the UI, you can retrieve the image directly from Python.

```python walker = pyg.walk(df, spec="./chartmeta0.json")

edit the chart in the UI and click the save button

walker.savecharttofile("Chart 1", "chart1.svg", savetype="svg") pngbytes = walker.exportchartpng("Chart 1") svgbytes = walker.exportchartsvg("Chart 1") ```

Use pygwalker in Streamlit

Streamlit allows you to host a web version of pygwalker without figuring out details of how web application works.

Here are some of the app examples build with pygwalker and streamlit: + PyGWalker + streamlit for Bike sharing dataset + Earthquake Dashboard

```python from pygwalker.api.streamlit import StreamlitRenderer import pandas as pd import streamlit as st

Adjust the width of the Streamlit page

st.setpageconfig( page_title="Use Pygwalker In Streamlit", layout="wide" )

Add Title

st.title("Use Pygwalker In Streamlit")

You should cache your pygwalker renderer, if you don't want your memory to explode

@st.cacheresource def getpygrenderer() -> "StreamlitRenderer": df = pd.readcsv("./bikesharingdc.csv") # If you want to use feature of saving chart config, set spec_io_mode="rw" return StreamlitRenderer(df, spec="./gwconfig.json", specio_mode="rw")

renderer = getpygrenderer()

renderer.explorer() ```

API Reference

pygwalker.walk

| Parameter | Type | Default | Description | |------------------------|-----------------------------------------------------------|----------------------|--------------------------------------------------------------------------------------------------------------------------------------------------| | dataset | Union[DataFrame, Connector] | - | The dataframe or connector to be used. | | gid | Union[int, str] | None | ID for the GraphicWalker container div, formatted as 'gwalker-{gid}'. | | env | Literal['Jupyter', 'JupyterWidget'] | 'JupyterWidget' | Environment using pygwalker. | | fieldspecs | Optional[Dict[str, FieldSpec]] | None | Specifications of fields. Will be automatically inferred from dataset if not specified. | | hidedatasourceconfig | bool | True | If True, hides DataSource import and export button. | | themekey | Literal['vega', 'g2'] | 'g2' | Theme type for the GraphicWalker. | | appearance | Literal['media', 'light', 'dark'] | 'media' | Theme setting. 'media' will auto-detect the OS theme. | | spec | str | "" | Chart configuration data. Can be a configuration ID, JSON, or remote file URL. | | usepreview | bool | True | If True, uses the preview function. | | kernel_computation | bool | False | If True, uses kernel computation for data. | | **kwargs | Any | - | Additional keyword arguments. |

Development

Refer it: local-development

Tested Environments

• [x] Jupyter Notebook
• [x] Google Colab
• [x] Kaggle Code
• [x] Jupyter Lab
• [x] Jupyter Lite
• [x] Databricks Notebook (Since version 0.1.4a0)
• [x] Jupyter Extension for Visual Studio Code (Since version 0.1.4a0)
• [x] Most web applications compatiable with IPython kernels. (Since version 0.1.4a0)
• [x] Streamlit (Since version 0.1.4.9), enabled with pyg.walk(df, env='Streamlit')
• [x] DataCamp Workspace (Since version 0.1.4a0)
• [x] Panel. See panel-graphic-walker.
• [x] marimo (Since version 0.4.9.11)
• [ ] Hex Projects
• [ ] ...feel free to raise an issue for more environments.

Configuration And Privacy Policy(pygwalker >= 0.3.10)

You can use pygwalker config to set your privacy configuration.

```bash $ pygwalker config --help

usage: pygwalker config [-h] [--set [key=value ...]] [--reset [key ...]] [--reset-all] [--list]

Modify configuration file. (default: ~/Library/Application Support/pygwalker/config.json) Available configurations:

• privacy 'offline', 'update-only', 'events'. "offline": fully offline, no data is send or api is requested "update-only": only check whether this is a new version of pygwalker to update "events": share which events about which feature is used in pygwalker, it only contains events data about which feature you arrive for product optimization. No DATA YOU ANALYSIS IS SEND. Events data will bind with a unique id, which is generated by pygwalker when it is installed based on timestamp. We will not collect any other information about you.

• kanaries_token 'your kanaries token'. your kanaries token, you can get it from https://kanaries.net. refer: https://space.kanaries.net/t/how-to-get-api-key-of-kanaries. by kanaries token, you can use kanaries service in pygwalker, such as share chart, share config.

options: -h, --help show this help message and exit --set [key=value ...] Set configuration. e.g. "pygwalker config --set privacy=update-only" --reset [key ...] Reset user configuration and use default values instead. e.g. "pygwalker config --reset privacy" --reset-all Reset all user configuration and use default values instead. e.g. "pygwalker config --reset-all" --list List current used configuration. ```

More details, refer it: How to set your privacy configuration?

License

Apache License 2.0

Contribution Guideline

You are encouraged to contribute to PyGWalker in any way that suits your interests. This may include: - Answering questions and providing support - Sharing ideas for new features - Reporting bugs and glitches - Contributing code to the project - Offering suggestions for website improvements and better documentation

Resources

PyGWalker Cloud is released! You can now save your charts to cloud, publish the interactive cell as a web app and use advanced GPT-powered features. Check out the PyGWalker Cloud for more details.

• Check out more resources about PyGWalker on Kanaries PyGWalker
• PyGWalker Paper PyGWalker: On-the-fly Assistant for Exploratory Visual Data Analysis
• We are also working on RATH: an Open Source, Automate exploratory data analysis software that redefines the workflow of data wrangling, exploration and visualization with AI-powered automation. Check out the Kanaries website and RATH GitHub for more!
• Youtube: How to explore data with PyGWalker in Python
• Use pygwalker to build visual analysis app in streamlit
• Use panel-graphic-walker to build data visualization apps with Panel.
• If you encounter any issues and need support, please join our Discord channel or raise an issue on github.
• Share pygwalker on these social media platforms if you like it!