pandas ecosystem

Increasingly, packages are being built on top of pandas to address specific needs in data preparation, analysis and visualization. This is encouraging because it means pandas is not only helping users to handle their data tasks but also that it provides a better starting point for developers to build powerful and more focused data tools. The creation of libraries that complement pandas’ functionality also allows pandas development to remain focused around it’s original requirements.

This is an inexhaustive list of projects that build on pandas in order to provide tools in the PyData space. For a list of projects that depend on pandas, see the libraries.io usage page for pandas or search pypi for pandas.

We’d like to make it easier for users to find these projects, if you know of other substantial projects that you feel should be on this list, please let us know.

Data cleaning and validation

Pyjanitor

Pyjanitor provides a clean API for cleaning data, using method chaining.

Engarde

Engarde is a lightweight library used to explicitly state assumptions about your datasets and check that they’re actually true.

pandas-path

Since Python 3.4, pathlib has been included in the Python standard library. Path objects provide a simple and delightful way to interact with the file system. The pandas-path package enables the Path API for pandas through a custom accessor .path. Getting just the filenames from a series of full file paths is as simple as my_files.path.name. Other convenient operations like joining paths, replacing file extensions, and checking if files exist are also available.

Statistics and machine learning

pandas-tfrecords

Easy saving pandas dataframe to tensorflow tfrecords format and reading tfrecords to pandas.

Statsmodels

Statsmodels is the prominent Python “statistics and econometrics library” and it has a long-standing special relationship with pandas. Statsmodels provides powerful statistics, econometrics, analysis and modeling functionality that is out of pandas’ scope. Statsmodels leverages pandas objects as the underlying data container for computation.

sklearn-pandas

Use pandas DataFrames in your scikit-learn ML pipeline.

Featuretools

Featuretools is a Python library for automated feature engineering built on top of pandas. It excels at transforming temporal and relational datasets into feature matrices for machine learning using reusable feature engineering “primitives”. Users can contribute their own primitives in Python and share them with the rest of the community.

Compose

Compose is a machine learning tool for labeling data and prediction engineering. It allows you to structure the labeling process by parameterizing prediction problems and transforming time-driven relational data into target values with cutoff times that can be used for supervised learning.

STUMPY

STUMPY is a powerful and scalable Python library for modern time series analysis. At its core, STUMPY efficiently computes something called a matrix profile, which can be used for a wide variety of time series data mining tasks.

Visualization

Pandas has its own Styler class for table visualization, and while pandas also has built-in support for data visualization through charts with matplotlib, there are a number of other pandas-compatible libraries.

Altair

Altair is a declarative statistical visualization library for Python. With Altair, you can spend more time understanding your data and its meaning. Altair’s API is simple, friendly and consistent and built on top of the powerful Vega-Lite JSON specification. This elegant simplicity produces beautiful and effective visualizations with a minimal amount of code. Altair works with pandas DataFrames.

Bokeh

Bokeh is a Python interactive visualization library for large datasets that natively uses the latest web technologies. Its goal is to provide elegant, concise construction of novel graphics in the style of Protovis/D3, while delivering high-performance interactivity over large data to thin clients.

Pandas-Bokeh provides a high level API for Bokeh that can be loaded as a native pandas plotting backend via

pd.set_option("plotting.backend", "pandas_bokeh")

It is very similar to the matplotlib plotting backend, but provides interactive web-based charts and maps.

Seaborn

Seaborn is a Python visualization library based on matplotlib. It provides a high-level, dataset-oriented interface for creating attractive statistical graphics. The plotting functions in seaborn understand pandas objects and leverage pandas grouping operations internally to support concise specification of complex visualizations. Seaborn also goes beyond matplotlib and pandas with the option to perform statistical estimation while plotting, aggregating across observations and visualizing the fit of statistical models to emphasize patterns in a dataset.

plotnine

Hadley Wickham’s ggplot2 is a foundational exploratory visualization package for the R language. Based on “The Grammar of Graphics” it provides a powerful, declarative and extremely general way to generate bespoke plots of any kind of data. Various implementations to other languages are available. A good implementation for Python users is has2k1/plotnine.

IPython vega

IPython Vega leverages Vega to create plots within Jupyter Notebook.

Plotly

Plotly’s Python API enables interactive figures and web shareability. Maps, 2D, 3D, and live-streaming graphs are rendered with WebGL and D3.js. The library supports plotting directly from a pandas DataFrame and cloud-based collaboration. Users of matplotlib, ggplot for Python, and Seaborn can convert figures into interactive web-based plots. Plots can be drawn in IPython Notebooks , edited with R or MATLAB, modified in a GUI, or embedded in apps and dashboards. Plotly is free for unlimited sharing, and has cloud, offline, or on-premise accounts for private use.

Lux

Lux is a Python library that facilitates fast and easy experimentation with data by automating the visual data exploration process. To use Lux, simply add an extra import alongside pandas:

import lux
import pandas as pd

df = pd.read_csv("data.csv")
df  # discover interesting insights!

By printing out a dataframe, Lux automatically recommends a set of visualizations that highlights interesting trends and patterns in the dataframe. Users can leverage any existing pandas commands without modifying their code, while being able to visualize their pandas data structures (e.g., DataFrame, Series, Index) at the same time. Lux also offers a powerful, intuitive language that allow users to create Altair, matplotlib, or Vega-Lite visualizations without having to think at the level of code.

Qtpandas

Spun off from the main pandas library, the qtpandas library enables DataFrame visualization and manipulation in PyQt4 and PySide applications.

D-Tale

D-Tale is a lightweight web client for visualizing pandas data structures. It provides a rich spreadsheet-style grid which acts as a wrapper for a lot of pandas functionality (query, sort, describe, corr…) so users can quickly manipulate their data. There is also an interactive chart-builder using Plotly Dash allowing users to build nice portable visualizations. D-Tale can be invoked with the following command

import dtale

dtale.show(df)

D-Tale integrates seamlessly with Jupyter notebooks, Python terminals, Kaggle & Google Colab. Here are some demos of the grid and chart-builder.

hvplot

hvPlot is a high-level plotting API for the PyData ecosystem built on HoloViews. It can be loaded as a native pandas plotting backend via

pd.set_option("plotting.backend", "hvplot")

IDE

IPython

IPython is an interactive command shell and distributed computing environment. IPython tab completion works with pandas methods and also attributes like DataFrame columns.

Jupyter Notebook / Jupyter Lab

Jupyter Notebook is a web application for creating Jupyter notebooks. A Jupyter notebook is a JSON document containing an ordered list of input/output cells which can contain code, text, mathematics, plots and rich media. Jupyter notebooks can be converted to a number of open standard output formats (HTML, HTML presentation slides, LaTeX, PDF, ReStructuredText, Markdown, Python) through ‘Download As’ in the web interface and jupyter convert in a shell.

pandas DataFrames implement _repr_html_ and _repr_latex methods which are utilized by Jupyter Notebook for displaying (abbreviated) HTML or LaTeX tables. LaTeX output is properly escaped. (Note: HTML tables may or may not be compatible with non-HTML Jupyter output formats.)

See Options and Settings and Available Options for pandas display. settings.

Quantopian/qgrid

qgrid is “an interactive grid for sorting and filtering DataFrames in IPython Notebook” built with SlickGrid.

Spyder

Spyder is a cross-platform PyQt-based IDE combining the editing, analysis, debugging and profiling functionality of a software development tool with the data exploration, interactive execution, deep inspection and rich visualization capabilities of a scientific environment like MATLAB or Rstudio.

Its Variable Explorer allows users to view, manipulate and edit pandas Index, Series, and DataFrame objects like a “spreadsheet”, including copying and modifying values, sorting, displaying a “heatmap”, converting data types and more. pandas objects can also be renamed, duplicated, new columns added, copied/pasted to/from the clipboard (as TSV), and saved/loaded to/from a file. Spyder can also import data from a variety of plain text and binary files or the clipboard into a new pandas DataFrame via a sophisticated import wizard.

Most pandas classes, methods and data attributes can be autocompleted in Spyder’s Editor and IPython Console, and Spyder’s Help pane can retrieve and render Numpydoc documentation on pandas objects in rich text with Sphinx both automatically and on-demand.

API

pandas-datareader

pandas-datareader is a remote data access library for pandas (PyPI:pandas-datareader). It is based on functionality that was located in pandas.io.data and pandas.io.wb but was split off in v0.19. See more in the pandas-datareader docs:

The following data feeds are available:

• Google Finance

• Tiingo

• Morningstar

• IEX

• Robinhood

• Enigma

• Quandl

• FRED

• Fama/French

• World Bank

• OECD

• Eurostat

• TSP Fund Data

• Nasdaq Trader Symbol Definitions

• Stooq Index Data

• MOEX Data

Quandl/Python

Quandl API for Python wraps the Quandl REST API to return pandas DataFrames with timeseries indexes.

Pydatastream

PyDatastream is a Python interface to the Refinitiv Datastream (DWS) REST API to return indexed pandas DataFrames with financial data. This package requires valid credentials for this API (non free).

pandaSDMX

pandaSDMX is a library to retrieve and acquire statistical data and metadata disseminated in SDMX 2.1, an ISO-standard widely used by institutions such as statistics offices, central banks, and international organisations. pandaSDMX can expose datasets and related structural metadata including data flows, code-lists, and data structure definitions as pandas Series or MultiIndexed DataFrames.

fredapi

fredapi is a Python interface to the Federal Reserve Economic Data (FRED) provided by the Federal Reserve Bank of St. Louis. It works with both the FRED database and ALFRED database that contains point-in-time data (i.e. historic data revisions). fredapi provides a wrapper in Python to the FRED HTTP API, and also provides several convenient methods for parsing and analyzing point-in-time data from ALFRED. fredapi makes use of pandas and returns data in a Series or DataFrame. This module requires a FRED API key that you can obtain for free on the FRED website.

dataframe_sql

dataframe_sql is a Python package that translates SQL syntax directly into operations on pandas DataFrames. This is useful when migrating from a database to using pandas or for users more comfortable with SQL looking for a way to interface with pandas.

Domain specific

Geopandas

Geopandas extends pandas data objects to include geographic information which support geometric operations. If your work entails maps and geographical coordinates, and you love pandas, you should take a close look at Geopandas.

xarray

xarray brings the labeled data power of pandas to the physical sciences by providing N-dimensional variants of the core pandas data structures. It aims to provide a pandas-like and pandas-compatible toolkit for analytics on multi- dimensional arrays, rather than the tabular data for which pandas excels.

IO

BCPandas

BCPandas provides high performance writes from pandas to Microsoft SQL Server, far exceeding the performance of the native df.to_sql method. Internally, it uses Microsoft’s BCP utility, but the complexity is fully abstracted away from the end user. Rigorously tested, it is a complete replacement for df.to_sql.

Deltalake

Deltalake python package lets you access tables stored in Delta Lake natively in Python without the need to use Spark or JVM. It provides the delta_table.to_pyarrow_table().to_pandas() method to convert any Delta table into Pandas dataframe.

Out-of-core

Blaze

Blaze provides a standard API for doing computations with various in-memory and on-disk backends: NumPy, pandas, SQLAlchemy, MongoDB, PyTables, PySpark.

Cylon

Cylon is a fast, scalable, distributed memory parallel runtime with a pandas like Python DataFrame API. ”Core Cylon” is implemented with C++ using Apache Arrow format to represent the data in-memory. Cylon DataFrame API implements most of the core operators of pandas such as merge, filter, join, concat, group-by, drop_duplicates, etc. These operators are designed to work across thousands of cores to scale applications. It can interoperate with pandas DataFrame by reading data from pandas or converting data to pandas so users can selectively scale parts of their pandas DataFrame applications.

from pycylon import read_csv, DataFrame, CylonEnv
from pycylon.net import MPIConfig

# Initialize Cylon distributed environment
config: MPIConfig = MPIConfig()
env: CylonEnv = CylonEnv(config=config, distributed=True)

df1: DataFrame = read_csv('/tmp/csv1.csv')
df2: DataFrame = read_csv('/tmp/csv2.csv')

# Using 1000s of cores across the cluster to compute the join
df3: Table = df1.join(other=df2, on=[0], algorithm="hash", env=env)

print(df3)

Dask

Dask is a flexible parallel computing library for analytics. Dask provides a familiar DataFrame interface for out-of-core, parallel and distributed computing.

Dask-ML

Dask-ML enables parallel and distributed machine learning using Dask alongside existing machine learning libraries like Scikit-Learn, XGBoost, and TensorFlow.

Koalas

Koalas provides a familiar pandas DataFrame interface on top of Apache Spark. It enables users to leverage multi-cores on one machine or a cluster of machines to speed up or scale their DataFrame code.

Modin

The modin.pandas DataFrame is a parallel and distributed drop-in replacement for pandas. This means that you can use Modin with existing pandas code or write new code with the existing pandas API. Modin can leverage your entire machine or cluster to speed up and scale your pandas workloads, including traditionally time-consuming tasks like ingesting data (read_csv, read_excel, read_parquet, etc.).

# import pandas as pd
import modin.pandas as pd

df = pd.read_csv("big.csv")  # use all your cores!

Odo

Odo provides a uniform API for moving data between different formats. It uses pandas own read_csv for CSV IO and leverages many existing packages such as PyTables, h5py, and pymongo to move data between non pandas formats. Its graph based approach is also extensible by end users for custom formats that may be too specific for the core of odo.

Pandarallel

Pandarallel provides a simple way to parallelize your pandas operations on all your CPUs by changing only one line of code. If also displays progress bars.

from pandarallel import pandarallel

pandarallel.initialize(progress_bar=True)

# df.apply(func)
df.parallel_apply(func)

Vaex

Increasingly, packages are being built on top of pandas to address specific needs in data preparation, analysis and visualization. Vaex is a Python library for Out-of-Core DataFrames (similar to pandas), to visualize and explore big tabular datasets. It can calculate statistics such as mean, sum, count, standard deviation etc, on an N-dimensional grid up to a billion (10⁹) objects/rows per second. Visualization is done using histograms, density plots and 3d volume rendering, allowing interactive exploration of big data. Vaex uses memory mapping, zero memory copy policy and lazy computations for best performance (no memory wasted).

• vaex.from_pandas

• vaex.to_pandas_df

Extension data types

pandas provides an interface for defining extension types to extend NumPy’s type system. The following libraries implement that interface to provide types not found in NumPy or pandas, which work well with pandas’ data containers.

Cyberpandas

Cyberpandas provides an extension type for storing arrays of IP Addresses. These arrays can be stored inside pandas’ Series and DataFrame.

Pandas-Genomics

Pandas-Genomics provides extension types, extension arrays, and extension accessors for working with genomics data

Pint-Pandas

Pint-Pandas <https://github.com/hgrecco/pint-pandas> provides an extension type for storing numeric arrays with units. These arrays can be stored inside pandas’ Series and DataFrame. Operations between Series and DataFrame columns which use pint’s extension array are then units aware.

Text Extensions for Pandas

Text Extensions for Pandas <https://ibm.biz/text-extensions-for-pandas> provides extension types to cover common data structures for representing natural language data, plus library integrations that convert the outputs of popular natural language processing libraries into Pandas DataFrames.

Accessors

A directory of projects providing extension accessors. This is for users to discover new accessors and for library authors to coordinate on the namespace.

Library	Accessor	Classes	Description
cyberpandas	ip	Series	Provides common operations for working with IP addresses.
pdvega	vgplot	Series, DataFrame	Provides plotting functions from the Altair library.
pandas-genomics	genomics	Series, DataFrame	Provides common operations for quality control and analysis of genomics data.
pandas_path	path	Index, Series	Provides pathlib.Path functions for Series.
pint-pandas	pint	Series, DataFrame	Provides units support for numeric Series and DataFrames.
composeml	slice	DataFrame	Provides a generator for enhanced data slicing.
datatest	validate	Series, DataFrame, Index	Provides validation, differences, and acceptance managers.
woodwork	ww	Series, DataFrame	Provides physical, logical, and semantic data typing information for Series and DataFrames.