Accepts integer/float string with units and raises when unit is ambiguous.

Author: Victor

pandas/tests/scalar/timedelta/test_construction.py

@@ -85,6 +85,10 @@ def test_construction():
     with pytest.raises(ValueError):
         Timedelta('10 days -1 h 1.5m 1s 3us')
 
+    # no units specified
+    with pytest.raises(ValueError):
+        Timedelta('3.1415')
+
     # invalid construction
     tm.assert_raises_regex(ValueError, "cannot construct a Timedelta",
                            lambda: Timedelta())
@@ -219,15 +223,17 @@ def __exit__(self, exc_type, exc_val, exc_tb):
 @pytest.mark.parametrize("redundant_unit, expectation", [
     ("", not_raises()),
     ("d", pytest.raises(ValueError)),
-    ("us", pytest.raises(ValueError))])
+    ("us", pytest.raises(ValueError)),
+])
 @pytest.mark.parametrize("unit", [
-    "d", "m", "s", "us"])
+   "d", "m", "s", "us"
+])
 @pytest.mark.parametrize("sign", [
-    +1, -1])
+   +1, -1
+])
 @pytest.mark.parametrize("num", [
-    0.001, 1, 10])
+    0.001, 1, 10
+])
 def test_string_with_unit(num, sign, unit, redundant_unit, expectation):
     with expectation:
-        val = sign * num
-        val_str = str(val) + redundant_unit
-        assert Timedelta(val_str, unit=unit) == Timedelta(val, unit=unit)
+        assert Timedelta(str(sign*num)+redundant_unit, unit=unit) == Timedelta(sign*num, unit=unit)