pip install sympy==1.9

Computer algebra system (CAS) in Python

Source
Among top 1000 packages on PyPI.
Over 5.5M downloads in the last 90 days.

Commonly used with sympy

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

tables

Hierarchical datasets for Python

numba

compiling Python code using LLVM

numexpr

Fast numerical expression evaluator for NumPy

patsy

A Python package for describing statistical models and for building design matrices.

astropy

Astronomy and astrophysics core library

dask

Parallel PyData with Task Scheduling

matplotlib-venn

Functions for plotting area-proportional two- and three-way Venn diagrams in matplotlib.

toolz

List processing tools and functional utilities

llvmlite

lightweight wrapper around basic LLVM functionality

spyder

The Scientific Python Development Environment

conda

OS-agnostic, system-level binary package manager.

blaze

Blaze

statsmodels

Statistical computations and models for Python

grin

A grep program configured the way I like it.

Bottleneck

Fast NumPy array functions written in C

multipledispatch

Multiple dispatch

mpmath

Python library for arbitrary-precision floating-point arithmetic

pycosat

bindings to picosat (a SAT solver)

bokeh

Interactive plots and applications in the browser from Python

Version usage of sympy

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

1.8

59.58%

1.9

22.72%

1.3

4.04%

1.6.1

2.83%

1.5.1

2.42%

1.4

1.71%

1.6

1.67%

1.7.1

1.61%

1.6.2

1.54%