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Release Notes for 1.5.1

Oscar Benjamin edited this page Jan 6, 2020 · 6 revisions

These are the release notes for SymPy 1.5.1.

SymPy 1.5.1 was released on 5th January 2020.

This version of SymPy has been tested on Python 2.7, 3.5, 3.6, 3.7, 3.8 and PyPy. See our Python version support policy for more information on when we plan to drop support for older Python versions. SymPy 1.5.1 will be the last version of SymPy to support Python 2.7 which has reached its end of life.

Install SymPy with

pip install -U sympy

or if you use Anaconda

conda install sympy


There are not many changes in 1.5.1 (see below).

Backwards compatibility breaks and deprecations

There are no known backward compatibility breaks or deprecations in this release.


  • core

    • Fix a regression in 1.5 that allowed expressions to compare equal to strings, and caused == to call str() on the other object. (#18063 by @asmeurer and @oscarbenjamin)
  • utilities


The following people contributed at least one patch to this release (names are given in alphabetical order by last name). A total of 3 people contributed to this release. People with a * by their names contributed a patch for the first time for this release; 0 people contributed for the first time for this release.

Thanks to everyone who contributed to this release!

  • Oscar Benjamin
  • S.Y. Lee
  • Aaron Meurer
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