pip install singledispatch==3.7.0

Backport functools.singledispatch from Python 3.4 to Python 2.6-3.3.

Source
Among top 1000 packages on PyPI.
Over 13.6M downloads in the last 90 days.

Commonly used with singledispatch

Based on how often these packages appear together in public requirements.txt files on GitHub.

functools32

Backport of the functools module from Python 3.2.3 for use on 2.7 and PyPy.

pyzmq

Python bindings for 0MQ

mistune

A sane Markdown parser with useful plugins and renderers

qtconsole

Jupyter Qt console

nbconvert

Converting Jupyter Notebooks

nbformat

The Jupyter Notebook format

jupyter-core

Jupyter core package. A base package on which Jupyter projects rely.

jupyter-client

Jupyter protocol implementation and client libraries

redshift-sqlalchemy

Amazon Redshift Dialect for sqlalchemy

ipykernel

IPython Kernel for Jupyter

notebook

A web-based notebook environment for interactive computing

jupyter-console

Jupyter terminal console

jsonschema

An implementation of JSON Schema validation for Python

ipywidgets

IPython HTML widgets for Jupyter

terminado

Tornado websocket backend for the Xterm.js Javascript terminal emulator library.

mpmath

Python library for arbitrary-precision floating-point arithmetic

bkcharts

High level chart types built on top of Bokeh

pywin32

Python for Window Extensions

configparser

Updated configparser from Python 3.8 for Python 2.6+.

Version usage of singledispatch

Proportion of downloaded versions in the last 3 months (only versions over 1%).

3.7.0

75.77%

3.4.0.3

10.31%

3.6.2

9.65%

3.6.1

3.86%