Fix repr For datetime Dimensions By Casting tile To int (#998)

* Use `tile`'s `repr()` Not `str()` for `Dim.__repr__`

* Update HISTORY.md

Author: nguyenv

HISTORY.md

@@ -3,6 +3,8 @@
 ## Bug Fixes
 * Fix default validity for write to nullable attribute [#994]((https://github.com/TileDB-Inc/TileDB-Py/pull/994)
 * Reduce query time for dense var-length arrays by including extra offset element in initial buffer allocation [#1005](https://github.com/TileDB-Inc/TileDB-Py/pull/1005)
+* Fix round-trippable repr for dimension tile [#998](https://github.com/TileDB-Inc/TileDB-Py/pull/998)
+
 ## API Changes
 * Addition of `ArraySchema.version` to get version of array schema [#949](https://github.com/TileDB-Inc/TileDB-Py/pull/949)
 * Deprecate `coords_filters` from `ArraySchema` [#993](https://github.com/TileDB-Inc/TileDB-Py/pull/993)

tiledb/libtiledb.pyx

@@ -1904,8 +1904,7 @@ cdef class Dim(object):
 
         # for consistency, print `var=True` for string-like types
         varlen = "" if not self.dtype in (np.str_, np.bytes_) else ", var=True"
-
-        return "Dim(name={0!r}, domain={1!s}, tile='{2!s}', dtype='{3!s}'{4}{5})" \
+        return "Dim(name={0!r}, domain={1!s}, tile={2!r}, dtype='{3!s}'{4}{5})" \
             .format(self.name, self.domain, self.tile, self.dtype, varlen, filters_str)
 
     def _repr_html_(self) -> str:

tiledb/tests/test_libtiledb.py

@@ -4256,6 +4256,7 @@ def test_dim_repr(self):
         dim_test_imports = textwrap.dedent(
             """
             from tiledb import Dim, FilterList, GzipFilter
+            import numpy
             from numpy import float64
             """
         )
@@ -4273,6 +4274,17 @@ def test_dim_repr(self):
                 dim = tiledb.Dim(name="d1", dtype=dtype, **opt_kwarg)
                 self.assertEqual(eval(repr(dim), g), dim)
 
+        # test datetime
+        g = dict()
+        exec(dim_test_imports, g)
+        dim = tiledb.Dim(
+            name="d1",
+            domain=(np.datetime64("2010-01-01"), np.datetime64("2020")),
+            tile=2,
+            dtype=np.datetime64("", "D"),
+        )
+        self.assertEqual(eval(repr(dim), g), dim)
+
     def test_arrayschema_repr(self, sparse_cell_order):
         filters = tiledb.FilterList([tiledb.ZstdFilter(-1)])
         for sparse in [False, True]: