SymPy 1.1.1 was released on July 27th, 2017.

SymPy 1.1.1 supports Python 2.7, 3.3, 3.4, 3.5, 3.6, and PyPy. It can be downloaded here. This is a bugfix release against version 1.1. The release notes for SymPy 1.1 can be found here.

Changes

Units

• Fix an issue with the Quantity Add postprocessor in Python 3.6.
• Support functions with quantities and dimensions.
• Fix addition of a quantity and a number.
• Workaround power of a quantity.
• Fix SI prefix definitions

Core

• Fix the Add/Mul postprocessor logic for subclasses.
• Fix various recursion issues in the Add assumptions that prevented isympy from working with the cache off.
• Fix some test failures on 32-bit systems.
• Allow for complex NumPy scalars in sympify.

Code generation

• Only call asarray in lambdify on Python builtin numeric types. Fixes lambdify for array subclasses such as xarray.
• Fix using preprocessor_statements kwarg in CCodeGen.

Matrices

• Fix stacking of empty matrices.

Other

• Build the docs with the latest version of Sphinx. Fixes the search functionality being broken in the docs.
• Fix the language classifiers in setup.py

Authors

The following people contributed at least one patch to this release (names are given in alphabetical order by last name). A total of 15 people contributed to this release. People with a * by their names contributed a patch for the first time for this release; 1 person contributed for the first time for this release.

Thanks to everyone who contributed to this release!

• Francesco Bonazzi
• Matthew Brett
• Gaurav Dhingra
• Isuru Fernando
• Jiri Kuncar*
• Kenneth Lyons
• Colin B. Macdonald
• Aaron Meurer
• Szymon Mieszczak
• Jason Moore
• Robin Neatherway
• Duc-Minh Phan
• Jason Siefken
• Chris Smith
• Kalevi Suominen