merge (#408)

* Update utils.py

* Update test_probabilistic.py

* Update test_resampling.py

* Update contingency.py

xskillscore/core/utils.py

@@ -189,7 +189,7 @@ def _helper_bool_to_int(da):
 
 def _check_identical_xr_types(a, b):
     """Check that a and b are both xr.Dataset or both xr.DataArray."""
-    if type(a) != type(b):
+    if not isinstance(a, type(b)):
         raise ValueError(f"a and b must be same type, found {type(a)} and {type(b)}")
     for d in [a, b]:
         if not isinstance(d, (xr.Dataset, xr.DataArray)):

xskillscore/tests/test_probabilistic.py

@@ -72,7 +72,7 @@ def assert_keep_attrs(actual, o, keep_attrs):
 
 
 def assign_type_input_output(actual, o):
-    assert type(o) == type(actual)
+    assert isinstance(o, type(actual))
 
 
 @pytest.mark.parametrize("chunk_bool", [True, False])

xskillscore/tests/test_resampling.py

@@ -148,7 +148,7 @@ def test_resample_inputs(a_1d, func, input, chunk, replace):
     # check dask collection preserved
     assert is_dask_collection(actual) if chunk else not is_dask_collection(actual)
     # input type preserved
-    assert type(actual) == type(a_1d)
+    assert isinstance(a_1d, type(actual))
 
 
 @pytest.mark.parametrize("func", resample_iterations_funcs)