add numpy dep

Author: blink1073

bindings/python/pyproject.toml

@@ -3,6 +3,8 @@ requires = [
     # ARROW-248, pin to less than 72.2.
     "setuptools>=70,<72.2",
     "cython>=3.0",
+    # Needed for numpy headers.
+    "numpy>=2.1.0",
     # Must be kept in sync with "project.dependencies" below.
     "pyarrow>=18.0,<18.1.0",
 ]

bindings/python/setup.py

@@ -132,9 +132,12 @@ def append_libbson_flags(module):
 
 
 def append_arrow_flags(ext):
+    import numpy as np
     import pyarrow as pa
 
     # From https://arrow.apache.org/docs/python/integration/extending.html#example
+    # The Numpy C headers are currently required
+    ext.include_dirs.append(np.get_include())
     ext.include_dirs.append(pa.get_include())
     ext.libraries.extend(pa.get_libraries())
     ext.library_dirs.extend(pa.get_library_dirs())