sympy/sympy
Apr 2025 – Feb 2026
5 Months active
Languages Used
PythonShellreStructuredTextRST
Technical Skills
Code RefactoringMathematical LibrariesPhysics UnitsUnit TestingCI/CDPython
Francesco Bonazzi
PROFILE
Francesco Bonazzi
Franz Bonazzi contributed to the sympy/sympy repository by developing and refining symbolic mathematics features, focusing on matrix calculus, array manipulation, and unit conversion reliability. He introduced utilities like ArraySum for efficient tensor summation, enhanced matrix derivative support for machine learning workflows, and improved documentation to clarify API usage and mathematical conventions. Using Python and reStructuredText, Franz addressed edge cases in array-to-matrix conversions, stabilized determinant and gradient computations, and maintained backward compatibility through disciplined API governance. His work emphasized code quality, robust testing automation, and clear technical writing, resulting in more maintainable, reliable, and user-friendly symbolic computation tools.
Overall Statistics
Feature vs Bugs
70%Features
Repository Contributions
38Total
Bugs
3
Commits
38
Features
7
Lines of code
869,873
Activity Months5
Your Network
153 peopleShared Repositories
153
Work History
February 2026
6 Commits • 2 Features
Feb 1, 2026February 2026 focused on API clarity and documentation quality for matrix operations and summation semantics in sympy/sympy. Delivered a documentation and notation consistency overhaul, including matrix derivatives, transpose notation, ArrayTensorProduct symbol, and a standardized Summation convention; implemented API modernization by deprecating rank() in favor of ndim. These changes improve end-user guidance, reduce confusion, and lay groundwork for future enhancements.
6 Commits • 2 Features
Feb 1, 2026February 2026 focused on API clarity and documentation quality for matrix operations and summation semantics in sympy/sympy. Delivered a documentation and notation consistency overhaul, including matrix derivatives, transpose notation, ArrayTensorProduct symbol, and a standardized Summation convention; implemented API modernization by deprecating rank() in favor of ndim. These changes improve end-user guidance, reduce confusion, and lay groundwork for future enhancements.
February 2026
January 2026
1 Commits
Jan 1, 2026January 2026: API stability and compatibility focus for sympy/sympy. Key work centers on reverting array expression terminology changes to preserve backward compatibility, restoring previous function names and documentation. This targeted bug fix minimizes user disruption and maintains consistency with established usage across tutorials and downstream code. Commit reference included for traceability and review context.
January 2026
1 Commits
Jan 1, 2026January 2026: API stability and compatibility focus for sympy/sympy. Key work centers on reverting array expression terminology changes to preserve backward compatibility, restoring previous function names and documentation. This targeted bug fix minimizes user disruption and maintains consistency with established usage across tutorials and downstream code. Commit reference included for traceability and review context.
December 2025
11 Commits • 2 Features
Dec 1, 2025December 2025: Strengthened SymPy's tensor/array workflow and ML-oriented documentation. Delivered a new ArraySum utility for array-like summations with simplification and evaluation, enabling more expressive and efficient tensor operations. Expanded matrix derivatives tutorials and ML examples in the documentation (gradient implementations for linear regression, PCA via matrix derivatives, and ridge regression), empowering users to implement common ML workflows with symbolic algebra. Stabilized matrix engine through focused bug fixes across array/matrix conversions and derivative computations, addressing array-to-matrix recognition, nested ArrayDiagonal flattening, singleton matrix handling, avoidance of Hadamard products on singleton matrices, determinant derivatives in non-matrix expressions, and more robust MatrixElement representations. These changes improve reliability for downstream ML tasks and reduce edge-case failures.
11 Commits • 2 Features
Dec 1, 2025December 2025: Strengthened SymPy's tensor/array workflow and ML-oriented documentation. Delivered a new ArraySum utility for array-like summations with simplification and evaluation, enabling more expressive and efficient tensor operations. Expanded matrix derivatives tutorials and ML examples in the documentation (gradient implementations for linear regression, PCA via matrix derivatives, and ridge regression), empowering users to implement common ML workflows with symbolic algebra. Stabilized matrix engine through focused bug fixes across array/matrix conversions and derivative computations, addressing array-to-matrix recognition, nested ArrayDiagonal flattening, singleton matrix handling, avoidance of Hadamard products on singleton matrices, determinant derivatives in non-matrix expressions, and more robust MatrixElement representations. These changes improve reliability for downstream ML tasks and reduce edge-case failures.
December 2025
November 2025
19 Commits • 3 Features
Nov 1, 2025November 2025 Monthly Summary for sympy/sympy focusing on business value, technical achievements, and maintainability, highlighting delivered features, fixed issues, and overall impact.
November 2025
19 Commits • 3 Features
Nov 1, 2025November 2025 Monthly Summary for sympy/sympy focusing on business value, technical achievements, and maintainability, highlighting delivered features, fixed issues, and overall impact.
April 2025
1 Commits
Apr 1, 2025April 2025 monthly summary for sympy/sympy focusing on the units module bug fix and test updates. Key outcomes: corrected quantity scale factor computation for unit conversions by refactoring get_quantity_scale_factor to properly handle multiplicative and power expressions; updated tests to cover the corrected scale factor logic; commits and tests validate the fix, improving reliability of unit conversions and overall code quality.
1 Commits
Apr 1, 2025April 2025 monthly summary for sympy/sympy focusing on the units module bug fix and test updates. Key outcomes: corrected quantity scale factor computation for unit conversions by refactoring get_quantity_scale_factor to properly handle multiplicative and power expressions; updated tests to cover the corrected scale factor logic; commits and tests validate the fix, improving reliability of unit conversions and overall code quality.
April 2025
Activity
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Quality Metrics
Correctness97.2%
Maintainability92.0%
Architecture92.6%
Performance92.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
PythonRSTShellreStructuredText
Technical Skills
API designCI/CDCode RefactoringDynamic typingMathematical LibrariesPhysics UnitsPythonPython developmentPython programmingPython scriptingSoftware MaintenanceTesting automationType checkingUnit Testingalgorithm design
Repositories Contributed To
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