Cython v0.29.21 Release Notes

Release Date: 2020-07-09 // 9 months ago
  • 🐛 Bugs fixed

    • Fix a regression in 0.29.20 where __div__ failed to be found in extension types. (Github issue #3688)

    • 🛠 Fix a regression in 0.29.20 where a call inside of a finally clause could fail to compile. Patch by David Woods. (Github issue #3712)

    • Zero-sized buffers could fail to validate as C/Fortran-contiguous. Patch by Clemens Hofreither. (Github issue #2093)

    • exec() did not allow recent Python syntax features in Py3.8+ due to https://bugs.python.org/issue35975. (Github issue #3695)

    • Binding staticmethods of Cython functions were not behaving like Python methods in Py3. Patch by Jeroen Demeyer and Michał Górny. (Github issue #3106)

    • Pythran calls to NumPy methods no longer generate useless method lookup code.

    • The PyUnicode_GET_LENGTH() macro was missing from the cpython.* declarations. Patch by Thomas Caswell. (Github issue #3692)

    • 🗄 The deprecated PyUnicode_*() C-API functions are no longer used, except for Unicode strings that contain lone surrogates. Unicode strings that contain non-BMP characters or surrogate pairs now generate different C code on 16-bit Python 2.x Unicode deployments (such as MS-Windows). Generating the C code on Python 3.x is recommended in this case. Original patches by Inada Naoki and Victor Stinner. (Github issues #3677, #3721, #3697)

    • Some template parameters were missing from the C++ std::unordered_map declaration. Patch by will. (Github issue #3685)

    • Several internal code generation issues regarding temporary variables were resolved. (Github issue #3708)