collection of so questions
trying to collect canonical Q&As for cython
- Error message “Cannot convert 'double *' to Python object” in Cython: https://stackoverflow.com/q/53763480/5769463
- Error message "Cannot convert Python object to ..." : https://stackoverflow.com/q/47005382/5769463
- Error message "Cannot covert Python object to type " for c++-classes : https://stackoverflow.com/q/52262669/5769463
- How to specify Python 3 source in Cython's setup.py? https://stackoverflow.com/a/53992016/5769463
- What does language_level in setup.py for cython do? https://stackoverflow.com/q/54900723/5769463
- Cython: understanding a typed memoryview with indirect_contignuous memory layout https://stackoverflow.com/a/53951543/5769463
- Wrapping C++ code with function pointer (or other non-type template parameter) as template parameter in cython https://stackoverflow.com/a/53584657/5769463
- How to test if Cython property/function is generator? https://stackoverflow.com/a/53425234/5769463
- declaration of functions with
except: https://stackoverflow.com/a/50687119/5769463 - cdef's cannot be accessed from pure python: https://stackoverflow.com/q/30228821/5769463
- don't use cdef float for timer.time(): https://stackoverflow.com/q/55997211/5769463
- mixing cdef and normal attributes in a cdef class: https://stackoverflow.com/q/42632297/5769463
- importing with another Python-version: https://stackoverflow.com/q/65597206/5769463
- Creating a numpy datatype from Cython struct: https://stackoverflow.com/q/62448946/5769463
- Speeding up Numpy with Cython: https://stackoverflow.com/q/70821944/5769463
- pickling of namedcollection with Cython: https://stackoverflow.com/a/55236951/5769463
- pickling typed memory-view with Cython: https://stackoverflow.com/a/58343703/5769463
- pickling cdef classes with __cinit__: https://stackoverflow.com/q/64069471/5769463
- What is an undefined reference/unresolved external symbol error and how do I fix it? https://stackoverflow.com/q/12573816/5769463
- different build-options for different cpp-files/ building c and c++ in the same project https://stackoverflow.com/a/59364990/5769463
- building a static library in setup and then linking extensions against it https://stackoverflow.com/q/57673283/5769463
- PYTHONHOME/PYTHONPATH for embeded interpreters https://stackoverflow.com/q/56857449/5769463
- use third party so/dll in C- or Cython-extension: https://stackoverflow.com/q/63804883/5769463
- right way to share C/CPP-code between extensions, ORD-violation example: https://stackoverflow.com/q/63875206/5769463
- Using dll in C-extensions https://stackoverflow.com/q/63804883/5769463 (more Windows specific explanations, but less complete solution https://stackoverflow.com/q/62662816/5769463)
- building extension for debug-build on Windows https://stackoverflow.com/a/59204487/5769463
- static Python on Windows (don't do it...) https://stackoverflow.com/q/62492622/5769463
- embeding Python into a dll with Cython https://stackoverflow.com/a/62417945/57694637
- linking against library doesn't work, because library is 32bit: https://stackoverflow.com/q/63750020/5769463
- cross compiling on Linux for Windows: https://stackoverflow.com/a/70474888/5769463
- compiling using mingw-w64 : https://stackoverflow.com/a/70654723/5769463
- creating a static executable https://stackoverflow.com/a/48836737/5769463
- Make executable file from multiple pyx files using cython https://stackoverflow.com/a/52977319/5769463
- Collapse multiple submodules to one Cython extension https://stackoverflow.com/a/52714500/5769463 https://stackoverflow.com/a/52729181/5769463
- Link Cython-wrapped C functions against BLAS from NumPy https://stackoverflow.com/a/52925796/5769463
- Using h/c-files created by Cython to embed Python in a C/C++-exe: https://stackoverflow.com/a/45424720/5769463
- Taking care of multi-phase intialization in embeded Python (Cython>=0.29) https://stackoverflow.com/a/55669343/5769463
- How to use shared-libraries in Cython-modules https://stackoverflow.com/a/45655654/5769463
- Setuptools & using numpy without preinstallation https://stackoverflow.com/a/54138355/5769463
- Cythons inlude_path vs. distutils include_dirs https://stackoverflow.com/q/56812008/5769463
- how to cythonize
__init__.py(also on Windows) https://stackoverflow.com/q/58797673/5769463 - Warning LNK4197 on Windows while building modules with cython https://stackoverflow.com/a/58866779/5769463
- reloading Cython modules https://stackoverflow.com/a/55172547/5769463
- how Cython and Numpy provide they functionality without need of link against them at link time: https://stackoverflow.com/a/58162089/576946344
- changing built-in compile-flags: https://stackoverflow.com/a/57057959/5769463
- numpy-header cannot be found: https://stackoverflow.com/q/2379898/5769463
- pyx-file and cpp-file have the same name, clash of object files: https://stackoverflow.com/q/50719086/5769463
- How to use user-defined types for numpy-array in Cython https://stackoverflow.com/a/50861680/5769463
- How to initialize PyArray_API: https://stackoverflow.com/a/47027598/5769463
- How to pass ownership of pointer to numpy-array: https://stackoverflow.com/a/55959886/5769463
- Cython for SIMD-instructions: https://stackoverflow.com/q/49058949/5769463
- accessing elements of a list in parallel: https://stackoverflow.com/a/60012137/5769463
- using thread-local containers: https://stackoverflow.com/a/58813699/5769463
- using different scheduling strategies: https://stackoverflow.com/a/58296988/5769463
- more complicated OMP-things with Cython: https://stackoverflow.com/a/57967436/5769463
- OMP-threads and Python-threads are different things: https://stackoverflow.com/a/53696844/5769463
- spawn and frozen scripts with multiprocessing: https://stackoverflow.com/a/47360452/5769463
- using different file-extension for modules: https://stackoverflow.com/a/59995134/5769463
- order of importing so,py,pyc files: https://stackoverflow.com/a/56119980/5769463
- reloading c-extensions: https://stackoverflow.com/a/55172547/5769463
- How to use shared-libraries in Cython-modules https://stackoverflow.com/a/45655654/5769463
- Collapse multiple submodules to one Cython extension https://stackoverflow.com/a/52714500/5769463 https://stackoverflow.com/a/52729181/5769463
- is there really no code in the resulting exe? https://stackoverflow.com/q/62388701/5769463
- PYTHONHOME/PYTHONPATH for embeded interpreters https://stackoverflow.com/q/56857449/5769463
- why option -Xlinker -export-dynamic is needed https://stackoverflow.com/a/67894308/5769463
- embeding python as shared object on linux: https://stackoverflow.com/a/67894308/5769463
- folding while converting to bytecode: https://stackoverflow.com/q/15171695/5769463, https://stackoverflow.com/q/34147515/5769463, https://stackoverflow.com/q/306313/5769463
tutorials how to do something
- How to test functions cdef'd in Cython https://stackoverflow.com/a/53696970/5769463
- How to use user-defined types for numpy-array in Cython https://stackoverflow.com/a/50861680/5769463
- How to create a C-Closure (also jit with Python) https://stackoverflow.com/q/51044122/5769463
- Putting PyObject* into C++-data-structures: https://stackoverflow.com/q/53695695/5769463
Q&As I found useful (for different reasons)
- "Why does
PyObject_GenericSetAttrbehave differently with lambdas than named functions" - https://stackoverflow.com/a/51794949/5769463 - Links to using gdb for cpython-debugging - How interning works in CPython https://stackoverflow.com/a/53506425/5769463 also https://stackoverflow.com/a/55644780/5769463
- using ffi with numba https://stackoverflow.com/a/52958324/5769463
- example of profiling with python https://stackoverflow.com/a/52750168/5769463
- using callgrind with python: https://stackoverflow.com/a/50732998/5769463
answers I'm proud of (obviously without objective reasons):
- Differences between PyCFunctionObject and PyFunctionObject, decriptor protocol, LOAD_METHOD-ptcode: https://stackoverflow.com/a/51794949/5769463
- Memory layout of unicode-objects, how pymalloc works: https://stackoverflow.com/a/54030412/5769463
- Memory consumption of int-object, how pymalloc works: https://stackoverflow.com/a/55621875/5769463
- Using pymalloc as allocator for c++-maps/performace tests: https://stackoverflow.com/a/56551790/5769463
- Why so are loaded before py-files? https://stackoverflow.com/q/56004885/5769463
- numexpr sets the number of vml-threads: https://stackoverflow.com/a/59603509/5769463
- merge current branch (
dev) into master:git push $(git rev-parse --show-toplevel) dev:master: https://stackoverflow.com/a/20788245/5769463 - rebase only part of the branch:
git rebase —-onto <place-to-put-it> <last-change-that-should-NOT-move> <change to move>: https://stackoverflow.com/a/34927492/5769463 - tag a release via command line:
git tag -a v1.0.1 -m"my info about v1.0.1" && git push origin v1.0.1: https://stackoverflow.com/a/48534947/5769463