Add test

Author: pdnm

pandas/core/computation/pytables.py

@@ -200,7 +200,10 @@ def stringify(value):
                 v = v.tz_convert("UTC")
             return TermValue(v, v.value, kind)
         elif kind == "timedelta64" or kind == "timedelta":
-            v = Timedelta(v, unit="s").value
+            if isinstance(v, str):
+                v = Timedelta(v).value
+            else:
+                v = Timedelta(v, unit="s").value
             return TermValue(int(v), v, kind)
         elif meta == "category":
             metadata = extract_array(self.metadata, extract_numpy=True)

pandas/tests/scalar/timedelta/test_constructors.py

@@ -289,3 +289,17 @@ def test_timedelta_constructor_identity():
     expected = Timedelta(np.timedelta64(1, "s"))
     result = Timedelta(expected)
     assert result is expected
+
+
+@pytest.mark.parametrize(
+    "constructor, value, unit, expectation",
+    [
+        (Timedelta, "10s", "ms", (ValueError, "unit must be un-specified")),
+        (to_timedelta, "10s", "ms", (ValueError, "unit must be un-specified")),
+        (to_timedelta, ["1", 2, 3], "s", (ValueError, "unit must be un-specified")),
+    ],
+)
+def test_string_with_unit(constructor, value, unit, expectation):
+    exp, match = expectation
+    with pytest.raises(exp, match=match):
+        _ = constructor(value, unit=unit)