Resolve Interval

Author: rhshadrach

meson.build

@@ -18,6 +18,9 @@ versioneer = files('generate_version.py')
 
 add_project_arguments('-DNPY_NO_DEPRECATED_API=0', language: 'c')
 add_project_arguments('-DNPY_NO_DEPRECATED_API=0', language: 'cpp')
+# Enables settings __module__ on cdef classes
+# https://github.com/cython/cython/issues/7231
+add_project_arguments('-DCYTHON_USE_TYPE_SPECS=1', language: 'c')
 
 # Allow supporting older numpys than the version compiled against
 # Set the define to the min supported version of numpy for pandas

pandas/_libs/interval.pyx

@@ -445,6 +445,7 @@ cdef class Interval(IntervalMixin):
     >>> interval.closed
     'left'
     """
+    __module__ = "pandas"
 
     def __init__(self, left, right, str closed="right"):
         # note: it is faster to just do these checks than to use a special

pandas/tests/api/test_api.py

@@ -643,9 +643,6 @@ def test_attributes_module(module_name):
             # Explicit exceptions
             or ("Dtype" in name and obj.__module__ == "pandas")
             or (name == "Categorical" and obj.__module__ == "pandas")
-            # Setting __module__ on a cdef class has no effect
-            # https://github.com/cython/cython/issues/7231
-            or name == "Interval"
         )
     ]
     assert len(failures) == 0, failures

setup.py

@@ -321,7 +321,7 @@ def run(self) -> None:
     endian_macro = [("__LITTLE_ENDIAN__", "1")]
 
 
-extra_compile_args = []
+extra_compile_args = ["-DCYTHON_USE_TYPE_SPECS=1"]
 extra_link_args = []
 if is_platform_windows():
     if debugging_symbols_requested:
@@ -569,6 +569,9 @@ def srcpath(name=None, suffix=".pyx", subdir="src"):
         extra_compile_args.append("-qlanglvl=extended0x:nolibext")
         undef_macros.append("_POSIX_THREADS")
 
+    print("-" * 80)
+    print(extra_compile_args)
+    print("-" * 80)
     obj = Extension(
         f"pandas.{name}",
         sources=sources,