When test_assert_path_exists or test_fail_if_path_exists
was used on a function containing a CompilerDirectivesNode
it was inherited by that CompilerDirectivesNode. Therefore
you got misleading test failures if the path was in the
function but not within that CompilerDirectivesNode.

See #3616

…3616)

…, etc.) are now prefixed with the shared module name, instead of making them look like homeless builtins.

See https://bugs.python.org/issue20204
See python/cpython@490055a

See #3625

…essing "tp_flags" in the generated code.

…he same time since checking for PyCFunction became more costly in Py3.9.

See numpy/numpy#16266

… fallback. "int" seems overly lazy if it tends to be larger on many systems.

…API" #define for NumPy 1.19.[01].

…numpy.pxd that is incompatible with Cython 3.0.

…rn" sections.

… the same condition.

Closes #3763

This is a follow up to #3307

…getbuffer__" implementation.