pyccel/pyccel
Nov 2024 – Nov 2025
13 Months active
Languages Used
CFortranMarkdownPythonYAMLShellC++PowerShell
Technical Skills
API DesignAST ManipulationAbstract Syntax TreesAbstract Syntax Trees (AST)Bot DevelopmentBug Fixing
Emily Bourne
PROFILE
Emily Bourne
Louise Bourne engineered core compiler and interoperability features for the pyccel/pyccel repository, focusing on robust Python-to-C and Python-to-Fortran translation. She delivered advanced type and container handling, improved memory management, and modernized the typing API, enabling seamless cross-language data structures and function calls. Her work included refactoring code generation, enhancing CI/CD workflows, and introducing dependency management frameworks, all while maintaining code quality and test coverage. Using Python, C, and Fortran, Louise addressed complex challenges in code parsing, static analysis, and build automation. The depth of her contributions strengthened reliability, maintainability, and performance across the project’s evolving codebase.
Overall Statistics
Feature vs Bugs
63%Features
Repository Contributions
200Total
Bugs
43
Commits
200
Features
74
Lines of code
50,865
Activity Months13
Your Network
5 people
Work History
November 2025
1 Commits • 1 Features
Nov 1, 2025Monthly summary for 2025-11 focused on delivering a robust, scalable path handling improvement in pyccel/pyccel to enable safe parallel processing. The primary change removes runtime directory changes by eliminating os.chdir across modules and introducing absolute path handling, aligning with internal path utilities and workflow, pipeline scripts, and CLIs. This prepares the codebase for future parallel execution and reduces path-related runtime issues.
1 Commits • 1 Features
Nov 1, 2025Monthly summary for 2025-11 focused on delivering a robust, scalable path handling improvement in pyccel/pyccel to enable safe parallel processing. The primary change removes runtime directory changes by eliminating os.chdir across modules and introducing absolute path handling, aligning with internal path utilities and workflow, pipeline scripts, and CLIs. This prepares the codebase for future parallel execution and reduces path-related runtime issues.
November 2025
October 2025
14 Commits • 6 Features
Oct 1, 20252025-10 Monthly work summary for pyccel/pyccel focusing on customer value, stability, and performance. Key features delivered include advanced translation capabilities with nested function support, improved wrapper ergonomics, and developer tooling to expose C/Fortran code to Python via .pyi interfaces. Supporting CI and quality improvements improved reliability and reduced cycle time for changes. Codebase modernization aligns interface definitions and initialization naming across languages, bolstering maintainability and cross-language bindings.
October 2025
14 Commits • 6 Features
Oct 1, 20252025-10 Monthly work summary for pyccel/pyccel focusing on customer value, stability, and performance. Key features delivered include advanced translation capabilities with nested function support, improved wrapper ergonomics, and developer tooling to expose C/Fortran code to Python via .pyi interfaces. Supporting CI and quality improvements improved reliability and reduced cycle time for changes. Codebase modernization aligns interface definitions and initialization naming across languages, bolstering maintainability and cross-language bindings.
September 2025
9 Commits • 4 Features
Sep 1, 20252025-09 Monthly Summary for pyccel/pyccel: Key features delivered: - Interop and codegen enhancements for Fortran/C bindings: introduced a new @low_level decorator to stabilize low-level naming across Python and low-level implementations for pyccel-wrap integration, and adopted a faster class declaration approach via type(ClassName) to improve codegen performance and robustness. Commits: a756057e1af792e9e8df7f84c62f5c8e3352399e; a81312f491102d6d0ec4c44826fdffad5603462d; a57eb720d5693f679c16610d4f0ce3283abcb1af. - Function argument parsing enhancements: Extend function argument parsing to support positional-only, keyword-only, variadic (*args), and keyword variadic (**kwargs) arguments, including refactoring of FunctionDefArgument and related generation/parsing modules. Commit: 73787ab09d17fc6495bbf2a48b3e31a76b45113b. - External library dependency management framework: Introduce a system to manage external library dependencies (STC and others) with compiler_family, is_debug, and public get_exec, plus new Installer classes (StdLibInstaller, CWrapperInstaller, ExternalLibInstaller, STCInstaller, gFTLInstaller) used in manage_dependenc... Commit: 00b1fc9c0fcd31f0528b754fa96878fb014e04dc. - Windows installation and CI compatibility improvements: Improve Windows build and CI reliability by using MinGW Makefiles with CMake, skipping problematic tests on Windows, and stubbing errors related to Python version incompatibilities and OpenMP warnings. Commit: 7e5b0562371c43cf22698a844c5587d99d4de454. - Bug fixes: array handling, slice assignment, and CLI environment: Fix shape/stride calculation for Fortran-order arrays when C-contiguous; correct FunctionalFor slice assignment with indexing and enable floor division sizing; ensure default compiler selection respects PYCCEL_DEFAULT_COMPILER environment variable for CLI tooling. Commits: db6a68c2819a72e745dd932958bf422ec8c5ac99; 74febf0c69ee8f88fd4aeaa461d540cf1aeb6b85; 7567e413c1dbbed2ad3689ee538762efe3fe23cb.
9 Commits • 4 Features
Sep 1, 20252025-09 Monthly Summary for pyccel/pyccel: Key features delivered: - Interop and codegen enhancements for Fortran/C bindings: introduced a new @low_level decorator to stabilize low-level naming across Python and low-level implementations for pyccel-wrap integration, and adopted a faster class declaration approach via type(ClassName) to improve codegen performance and robustness. Commits: a756057e1af792e9e8df7f84c62f5c8e3352399e; a81312f491102d6d0ec4c44826fdffad5603462d; a57eb720d5693f679c16610d4f0ce3283abcb1af. - Function argument parsing enhancements: Extend function argument parsing to support positional-only, keyword-only, variadic (*args), and keyword variadic (**kwargs) arguments, including refactoring of FunctionDefArgument and related generation/parsing modules. Commit: 73787ab09d17fc6495bbf2a48b3e31a76b45113b. - External library dependency management framework: Introduce a system to manage external library dependencies (STC and others) with compiler_family, is_debug, and public get_exec, plus new Installer classes (StdLibInstaller, CWrapperInstaller, ExternalLibInstaller, STCInstaller, gFTLInstaller) used in manage_dependenc... Commit: 00b1fc9c0fcd31f0528b754fa96878fb014e04dc. - Windows installation and CI compatibility improvements: Improve Windows build and CI reliability by using MinGW Makefiles with CMake, skipping problematic tests on Windows, and stubbing errors related to Python version incompatibilities and OpenMP warnings. Commit: 7e5b0562371c43cf22698a844c5587d99d4de454. - Bug fixes: array handling, slice assignment, and CLI environment: Fix shape/stride calculation for Fortran-order arrays when C-contiguous; correct FunctionalFor slice assignment with indexing and enable floor division sizing; ensure default compiler selection respects PYCCEL_DEFAULT_COMPILER environment variable for CLI tooling. Commits: db6a68c2819a72e745dd932958bf422ec8c5ac99; 74febf0c69ee8f88fd4aeaa461d540cf1aeb6b85; 7567e413c1dbbed2ad3689ee538762efe3fe23cb.
September 2025
August 2025
12 Commits • 1 Features
Aug 1, 2025August 2025: Focused on reliability, correctness, and maintainability in pyccel/pyccel. Delivered core inlining and wrapper robustness fixes, interface/type-checking improvements, error reporting enhancements, memory correctness fixes, and codebase cleanliness with scope management enhancements. These changes reduce runtime errors, improve debugging, and stabilize code generation.
August 2025
12 Commits • 1 Features
Aug 1, 2025August 2025: Focused on reliability, correctness, and maintainability in pyccel/pyccel. Delivered core inlining and wrapper robustness fixes, interface/type-checking improvements, error reporting enhancements, memory correctness fixes, and codebase cleanliness with scope management enhancements. These changes reduce runtime errors, improve debugging, and stabilize code generation.
July 2025
13 Commits • 6 Features
Jul 1, 2025July 2025 monthly summary for pyccel/pyccel: Delivered a targeted package of CI enhancements, new language features, and code quality improvements that collectively improve reliability, performance, and maintainability. The work demonstrates strong ownership of build workflows, cross-language code generation, and memory safety, aligning delivery with business value and stakeholder expectations.
13 Commits • 6 Features
Jul 1, 2025July 2025 monthly summary for pyccel/pyccel: Delivered a targeted package of CI enhancements, new language features, and code quality improvements that collectively improve reliability, performance, and maintainability. The work demonstrates strong ownership of build workflows, cross-language code generation, and memory safety, aligning delivery with business value and stakeholder expectations.
July 2025
June 2025
38 Commits • 16 Features
Jun 1, 2025June 2025 monthly summary focused on stabilizing Pyccel's typing, build, and CI surfaces while driving typing API modernization, typing alignment for stubs/stdlib, and workflow/documentation quality. The work yielded a more reliable release process, faster type-checking feedback, and clearer language constructs that reduce maintenance burden across the codebase.
June 2025
38 Commits • 16 Features
Jun 1, 2025June 2025 monthly summary focused on stabilizing Pyccel's typing, build, and CI surfaces while driving typing API modernization, typing alignment for stubs/stdlib, and workflow/documentation quality. The work yielded a more reliable release process, faster type-checking feedback, and clearer language constructs that reduce maintenance burden across the codebase.
May 2025
14 Commits • 3 Features
May 1, 2025May 2025 summary: Strengthened pyccel/pyccel's code generation reliability and usability through targeted container/list handling improvements, enhanced Python typing support, and API refinements in Fortran and C code generation. Fixed key stability issues and added regression tests to prevent regressions in constant arrays and edge-case behaviors. Delivered business value by reducing maintenance risk, improving generated code correctness, and enabling broader interop capabilities across Python, C, and Fortran.
14 Commits • 3 Features
May 1, 2025May 2025 summary: Strengthened pyccel/pyccel's code generation reliability and usability through targeted container/list handling improvements, enhanced Python typing support, and API refinements in Fortran and C code generation. Fixed key stability issues and added regression tests to prevent regressions in constant arrays and edge-case behaviors. Delivered business value by reducing maintenance risk, improving generated code correctness, and enabling broader interop capabilities across Python, C, and Fortran.
May 2025
April 2025
14 Commits • 4 Features
Apr 1, 2025April 2025 (Month: 2025-04) delivered significant cross-language functionality and code-generation improvements in pyccel/pyccel, with focused bug fixes to ensure type-correctness and stable behavior. Key outcomes include enabling list argument support in Pyccel, expanding dictionary operations across C/Fortran, adding floor division assignment operator support, and advancing code generation tooling and test coverage. These changes collectively increase interoperability, reliability, and productivity for users targeting Python-to-C/Fortran translation. Summary of impact: - List argument support in Pyccel expands function interoperability with Python lists and enhances type annotations and C wrappers, backed by targeted tests. Commit: 61bc8f4ed31a4cc6c4c9a68404fa3669cfe80926. - Dictionary handling across C/Fortran enables returning dictionaries from Fortran, dict.popitem/dict.values/dict.pop support, with added tests/docs. Commits include 75b419b4914d8da761fd0b26d631f2207deba541, 4d29ccf8b913acb32c04fbdc9ee21aad1de09d84, 5f3cdf4abcf9f135b54596274a91d252bfc85150, 743215cc7c99c741fbdba3299018aebbd341ca92. - Floor division assignment operator (//=) support adds a new operator path through the AST/parser/codegen, with new tests. Commit: f50826fcbca098efb5964b08ee1935cfa2f141cc. - Code generation and tooling improvements include: output-first argument ordering, stub file generation, access context hints to constants/modules, spell-check improvements, removal of STC deprecated methods, and Windows LAPACK fixes. Commits: 0f25a0c1214a8c9c58c278a8687a6738f1aaa8a0, 2fe3aeded7be673a30a414956920d19301c3ae6a, 1500ff988e0ea087b046142d256fd7b018ec2656, e27b30659932fbfd5166895a8fcf521f69a22751, 2641e998adfbd056ed8c4c5cb8e5dd531d2d892c, 154cecd98fdc0feed78456eac50074cf01f89277. - Bug fixes reinforcing correctness: regression-free handling of Fortran insertion index casting and new tests validating complex number exponentiation type conversion. Commits: 8c75de396c13d228c30970e127a7a7648284b210, 1773cf2701c0d88c7bdfda468dd87675651c6f0b. Overall impact: Strengthened cross-language interoperability, improved reliability and maintainability of generated code, expanded feature surface for end users, and reinforced testing coverage to reduce risk across Python-to-Fortran and Python-to-C translation workflows.
April 2025
14 Commits • 4 Features
Apr 1, 2025April 2025 (Month: 2025-04) delivered significant cross-language functionality and code-generation improvements in pyccel/pyccel, with focused bug fixes to ensure type-correctness and stable behavior. Key outcomes include enabling list argument support in Pyccel, expanding dictionary operations across C/Fortran, adding floor division assignment operator support, and advancing code generation tooling and test coverage. These changes collectively increase interoperability, reliability, and productivity for users targeting Python-to-C/Fortran translation. Summary of impact: - List argument support in Pyccel expands function interoperability with Python lists and enhances type annotations and C wrappers, backed by targeted tests. Commit: 61bc8f4ed31a4cc6c4c9a68404fa3669cfe80926. - Dictionary handling across C/Fortran enables returning dictionaries from Fortran, dict.popitem/dict.values/dict.pop support, with added tests/docs. Commits include 75b419b4914d8da761fd0b26d631f2207deba541, 4d29ccf8b913acb32c04fbdc9ee21aad1de09d84, 5f3cdf4abcf9f135b54596274a91d252bfc85150, 743215cc7c99c741fbdba3299018aebbd341ca92. - Floor division assignment operator (//=) support adds a new operator path through the AST/parser/codegen, with new tests. Commit: f50826fcbca098efb5964b08ee1935cfa2f141cc. - Code generation and tooling improvements include: output-first argument ordering, stub file generation, access context hints to constants/modules, spell-check improvements, removal of STC deprecated methods, and Windows LAPACK fixes. Commits: 0f25a0c1214a8c9c58c278a8687a6738f1aaa8a0, 2fe3aeded7be673a30a414956920d19301c3ae6a, 1500ff988e0ea087b046142d256fd7b018ec2656, e27b30659932fbfd5166895a8fcf521f69a22751, 2641e998adfbd056ed8c4c5cb8e5dd531d2d892c, 154cecd98fdc0feed78456eac50074cf01f89277. - Bug fixes reinforcing correctness: regression-free handling of Fortran insertion index casting and new tests validating complex number exponentiation type conversion. Commits: 8c75de396c13d228c30970e127a7a7648284b210, 1773cf2701c0d88c7bdfda468dd87675651c6f0b. Overall impact: Strengthened cross-language interoperability, improved reliability and maintainability of generated code, expanded feature surface for end users, and reinforced testing coverage to reduce risk across Python-to-Fortran and Python-to-C translation workflows.
March 2025
14 Commits • 4 Features
Mar 1, 2025March 2025 monthly summary for pyccel/pyccel focused on expanding data-structure interoperability, strengthening the type/shape system, and improving runtime stability and build robustness. Key features delivered include Python set support and complex-argument handling within Pyccel, enabling isdisjoint for sets and allowing sets/dicts/strings as function arguments with corresponding Fortran-to-C argument wrapping improvements; strings as arguments and type-annotation support with refactored string handling and accompanying tests; and overall enhancements to the type system and shape handling (including correct annotation propagation for returned values, improved shape storage for indexed elements, and Min/Max native expressions). Additionally, code-generation and runtime stability fixes address shared library discovery, safer memory handling for temporaries and slice arguments, and Windows/Intel test stability, complemented by compiler configuration improvements to support multiple compilers in a single JSON file. These changes reduce runtime errors, improve numerical correctness, and broaden Pyccel’s interoperability and deployment reliability across platforms, contributing to longer-term maintainability and performance.
14 Commits • 4 Features
Mar 1, 2025March 2025 monthly summary for pyccel/pyccel focused on expanding data-structure interoperability, strengthening the type/shape system, and improving runtime stability and build robustness. Key features delivered include Python set support and complex-argument handling within Pyccel, enabling isdisjoint for sets and allowing sets/dicts/strings as function arguments with corresponding Fortran-to-C argument wrapping improvements; strings as arguments and type-annotation support with refactored string handling and accompanying tests; and overall enhancements to the type system and shape handling (including correct annotation propagation for returned values, improved shape storage for indexed elements, and Min/Max native expressions). Additionally, code-generation and runtime stability fixes address shared library discovery, safer memory handling for temporaries and slice arguments, and Windows/Intel test stability, complemented by compiler configuration improvements to support multiple compilers in a single JSON file. These changes reduce runtime errors, improve numerical correctness, and broaden Pyccel’s interoperability and deployment reliability across platforms, contributing to longer-term maintainability and performance.
March 2025
February 2025
26 Commits • 13 Features
Feb 1, 2025February 2025 — Pyccel/pyccel monthly summary. Delivered feature-rich enhancements, stability fixes, and broader Python/C interoperability to improve performance, reliability, and user adoption. Key features delivered include upgrading STC to v5.0, adding dict.keys support, enabling set initialisation from other objects, allowing saving function results into slices, and preliminary isinstance checks. We also removed pickle support to simplify serialization and updated Python minimum versions. Major bugs fixed include resolving missing pointer assignment, correcting the shape of multi-level containers, and improving error handling for edge cases. Overall, these changes reduce runtime crashes, improve correctness, and streamline CI/build pipelines, delivering measurable business value in reliability, performance, and developer productivity. Technologies demonstrated include Python and C integration, compile-time analysis, and robust error handling.
February 2025
26 Commits • 13 Features
Feb 1, 2025February 2025 — Pyccel/pyccel monthly summary. Delivered feature-rich enhancements, stability fixes, and broader Python/C interoperability to improve performance, reliability, and user adoption. Key features delivered include upgrading STC to v5.0, adding dict.keys support, enabling set initialisation from other objects, allowing saving function results into slices, and preliminary isinstance checks. We also removed pickle support to simplify serialization and updated Python minimum versions. Major bugs fixed include resolving missing pointer assignment, correcting the shape of multi-level containers, and improving error handling for edge cases. Overall, these changes reduce runtime crashes, improve correctness, and streamline CI/build pipelines, delivering measurable business value in reliability, performance, and developer productivity. Technologies demonstrated include Python and C integration, compile-time analysis, and robust error handling.
January 2025
19 Commits • 5 Features
Jan 1, 2025January 2025: Delivered core back-end enhancements for Pyccel focusing on interoperability, performance, and reliability. Highlights include cross-language collection operations for lists and sets on Fortran/C backends, dictionary support via C wrappers (returning Python dicts and dict.__getitem__), and expanded Pythonic interfaces with arithmetic magic methods and __len__. Also implemented array handling improvements (numpy stride fixes, STC's cspan adoption, and Intel compilation fixes) and strengthened build/CI/test infrastructure for older toolchains. These changes broaden the Pyccel API surface, improve portability between Python and compiled backends, and enhance stability and developer productivity.
19 Commits • 5 Features
Jan 1, 2025January 2025: Delivered core back-end enhancements for Pyccel focusing on interoperability, performance, and reliability. Highlights include cross-language collection operations for lists and sets on Fortran/C backends, dictionary support via C wrappers (returning Python dicts and dict.__getitem__), and expanded Pythonic interfaces with arithmetic magic methods and __len__. Also implemented array handling improvements (numpy stride fixes, STC's cspan adoption, and Intel compilation fixes) and strengthened build/CI/test infrastructure for older toolchains. These changes broaden the Pyccel API surface, improve portability between Python and compiled backends, and enhance stability and developer productivity.
January 2025
December 2024
11 Commits • 6 Features
Dec 1, 2024December 2024 monthly summary for pyccel/pyccel: Delivered high-value features and stability improvements across language features, wrappers, and codegen. Key features include @property support, C-level string handling for local declarations and dictionaries, __all__ translation via AllDeclaration, and wrapper enhancements for sets/lists in both C-Python and Fortran wrappers. Notable internal improvements include reordering FunctionDef constructor args to support default return values. Major bug fixes addressed array shape handling in conditional allocations, constructor method resolution order, Windows NumPy 2.0 integer handling, and class attribute/type-annotation naming issues. All work was validated with new tests and accompanying docs to ensure reliability and usability.
December 2024
11 Commits • 6 Features
Dec 1, 2024December 2024 monthly summary for pyccel/pyccel: Delivered high-value features and stability improvements across language features, wrappers, and codegen. Key features include @property support, C-level string handling for local declarations and dictionaries, __all__ translation via AllDeclaration, and wrapper enhancements for sets/lists in both C-Python and Fortran wrappers. Notable internal improvements include reordering FunctionDef constructor args to support default return values. Major bug fixes addressed array shape handling in conditional allocations, constructor method resolution order, Windows NumPy 2.0 integer handling, and class attribute/type-annotation naming issues. All work was validated with new tests and accompanying docs to ensure reliability and usability.
November 2024
15 Commits • 5 Features
Nov 1, 2024November 2024 (pyccel/pyccel) focused on expanding language features, hardening memory safety, and sharpening API and test stability. Key deliveries include set iteration support with robust for-loop generation; removal of the 128-character limit for Fortran strings with updated code generation; and expanded iterable/dictionary capabilities (e.g., dict.items) plus improved C-return semantics and list comprehension initialization. These changes broaden Pyccel's correctness and usability, enabling more natural Python idioms and stronger Fortran interop, while strengthening the codebase against forks and CI variability.
15 Commits • 5 Features
Nov 1, 2024November 2024 (pyccel/pyccel) focused on expanding language features, hardening memory safety, and sharpening API and test stability. Key deliveries include set iteration support with robust for-loop generation; removal of the 128-character limit for Fortran strings with updated code generation; and expanded iterable/dictionary capabilities (e.g., dict.items) plus improved C-return semantics and list comprehension initialization. These changes broaden Pyccel's correctness and usability, enabling more natural Python idioms and stronger Fortran interop, while strengthening the codebase against forks and CI variability.
November 2024
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Quality Metrics
Correctness90.4%
Maintainability86.4%
Architecture85.6%
Performance78.4%
AI Usage20.8%
Skills & Technologies
Programming Languages
CC++FortranLuaMakefileMarkdownPowerShellPythonShellTOML
Technical Skills
API DesignAST ManipulationAST manipulationAbstract Syntax Tree (AST)Abstract Syntax TreesAbstract Syntax Trees (AST)Array ManipulationAutomationBot DevelopmentBug FixingBuild AutomationBuild SystemBuild SystemsCC API
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline