BUG: Fix behavior of replace_list with mixed types.

pandas/core/dtypes/cast.py

@@ -2184,7 +2184,7 @@ def can_hold_element(dtype: np.dtype, element: Any) -> bool:
 
     if dtype.kind in ["i", "u"]:
         if tipo is not None:
-            return tipo.kind in ["i", "u"] and dtype.itemsize >= tipo.itemsize
+            return tipo.kind in ["f", "i", "u"] and dtype.itemsize >= tipo.itemsize
 
         # We have not inferred an integer from the dtype
         # check if we have a builtin int or a float equal to an int

pandas/tests/frame/methods/test_replace.py

@@ -1659,3 +1659,17 @@ def test_replace_bytes(self, frame_or_series):
         expected = obj.copy()
         obj = obj.replace({None: np.nan})
         tm.assert_equal(obj, expected)
+
+    @pytest.mark.parametrize(
+        "s, to_replace, value, expected",
+        [
+            (DataFrame([1]), np.array([1.0]), [0], DataFrame([0])),
+            (DataFrame([1]), np.array([1]), [0], DataFrame([0])),
+            (DataFrame([1.0]), np.array([1.0]), [0], DataFrame([0.0])),
+            (DataFrame([1.0]), np.array([1]), [0], DataFrame([0.0])),
+        ],
+    )
+    def test_replace_list_with_mixed_type(self, s, to_replace, value, expected):
+        # GH#40371
+        result = s.replace(to_replace, value)
+        tm.assert_frame_equal(result, expected)

pandas/tests/series/methods/test_replace.py

@@ -460,3 +460,17 @@ def test_str_replace_regex_default_raises_warning(self, pattern):
         with tm.assert_produces_warning(FutureWarning) as w:
             s.str.replace(pattern, "")
             assert re.match(msg, str(w[0].message))
+
+    @pytest.mark.parametrize(
+        "s, to_replace, value, expected",
+        [
+            (pd.Series([1]), np.array([1.0]), [0], pd.Series([0])),
+            (pd.Series([1]), np.array([1]), [0], pd.Series([0])),
+            (pd.Series([1.0]), np.array([1.0]), [0], pd.Series([0.0])),
+            (pd.Series([1.0]), np.array([1]), [0], pd.Series([0.0])),
+        ],
+    )
+    def test_replace_list_with_mixed_type(self, s, to_replace, value, expected):
+        # GH#40371
+        result = s.replace(to_replace, value)
+        tm.assert_series_equal(result, expected)