Fix read, seek with numpy integer sizes (#1927)

tiledb/tests/test_vfs.py

@@ -142,6 +142,11 @@ def test_write_read(self):
 
         fio = vfs.open(self.path("foo").encode("utf-8"), "rb")
         self.assertEqual(fio.read(3), buffer)
+        # test read with numpy integers
+        fio.seek(np.int64(0))
+        self.assertEqual(fio.read(np.int32(3)), buffer)
+        fio.seek(np.int64(0))
+        self.assertEqual(fio.read(np.uint64(3)), buffer)
         fio.close()
 
         # write / read empty input

tiledb/vfs.py

@@ -418,7 +418,7 @@ def seek(self, offset: int, whence: int = 0):
         beginning of the file, 1 uses the current file position, and 2 uses the
         end of the file as the reference point. whence can be omitted and defaults to 0.
         """
-        if not isinstance(offset, int):
+        if not np.issubdtype(type(offset), np.integer):
             raise TypeError(
                 f"Offset must be an integer or None (got type {type(offset)})"
             )
@@ -459,7 +459,7 @@ def read(self, size: int = -1) -> bytes:
         :return: The bytes in the file
 
         """
-        if not isinstance(size, int):
+        if not np.issubdtype(type(size), np.integer):
             raise TypeError(f"size must be an integer or None (got type {type(size)})")
         if not self.readable():
             raise IOError("Cannot read from write-only FileIO handle")