Silence some warnings.

xarray/coding/times.py

@@ -183,8 +183,11 @@ def decode_cf_datetime(num_dates, units, calendar=None,
         # fixes: https://github.com/pydata/pandas/issues/14068
         # these lines check if the the lowest or the highest value in dates
         # cause an OutOfBoundsDatetime (Overflow) error
-        pd.to_timedelta(flat_num_dates.min(), delta) + ref_date
-        pd.to_timedelta(flat_num_dates.max(), delta) + ref_date
+        with warnings.catch_warnings():
+            warnings.filterwarnings('ignore', 'invalid value encountered',
+                                    RuntimeWarning)
+            pd.to_timedelta(flat_num_dates.min(), delta) + ref_date
+            pd.to_timedelta(flat_num_dates.max(), delta) + ref_date
 
         # Cast input dates to integers of nanoseconds because `pd.to_datetime`
         # works much faster when dealing with integers

xarray/core/formatting.py

@@ -183,7 +183,7 @@ def format_items(x):
         day_part = (x[~pd.isnull(x)]
                     .astype('timedelta64[D]')
                     .astype('timedelta64[ns]'))
-        time_needed = x != day_part
+        time_needed = x[~pd.isnull(x)] != day_part
         day_needed = day_part != np.timedelta64(0, 'ns')
         if np.logical_not(day_needed).all():
             timedelta_format = 'time'

xarray/core/missing.py

@@ -3,6 +3,8 @@
 from collections import Iterable
 from functools import partial
 
+import warnings
+
 import numpy as np
 import pandas as pd
 
@@ -207,13 +209,16 @@ def interp_na(self, dim=None, use_coordinate=True, method='linear', limit=None,
     interp_class, kwargs = _get_interpolator(method, **kwargs)
     interpolator = partial(func_interpolate_na, interp_class, **kwargs)
 
-    arr = apply_ufunc(interpolator, index, self,
-                      input_core_dims=[[dim], [dim]],
-                      output_core_dims=[[dim]],
-                      output_dtypes=[self.dtype],
-                      dask='parallelized',
-                      vectorize=True,
-                      keep_attrs=True).transpose(*self.dims)
+    with warnings.catch_warnings():
+        warnings.filterwarnings('ignore', 'overflow', RuntimeWarning)
+        warnings.filterwarnings('ignore', 'invalid value', RuntimeWarning)
+        arr = apply_ufunc(interpolator, index, self,
+                          input_core_dims=[[dim], [dim]],
+                          output_core_dims=[[dim]],
+                          output_dtypes=[self.dtype],
+                          dask='parallelized',
+                          vectorize=True,
+                          keep_attrs=True).transpose(*self.dims)
 
     if limit is not None:
         arr = arr.where(valids)

xarray/plot/plot.py

@@ -479,9 +479,11 @@ def line(self, *args, **kwargs):
 
 def _rescale_imshow_rgb(darray, vmin, vmax, robust):
     assert robust or vmin is not None or vmax is not None
+    # TODO: remove when min numpy version is bumped to 1.13
     # There's a cyclic dependency via DataArray, so we can't import from
     # xarray.ufuncs in global scope.
     from xarray.ufuncs import maximum, minimum
+
     # Calculate vmin and vmax automatically for `robust=True`
     if robust:
         if vmax is None:
@@ -507,7 +509,10 @@ def _rescale_imshow_rgb(darray, vmin, vmax, robust):
     # After scaling, downcast to 32-bit float.  This substantially reduces
     # memory usage after we hand `darray` off to matplotlib.
     darray = ((darray.astype('f8') - vmin) / (vmax - vmin)).astype('f4')
-    return minimum(maximum(darray, 0), 1)
+    with warnings.catch_warnings():
+        warnings.filterwarnings('ignore', 'xarray.ufuncs',
+                                PendingDeprecationWarning)
+        return minimum(maximum(darray, 0), 1)
 
 
 def _plot2d(plotfunc):

xarray/plot/utils.py

@@ -213,8 +213,10 @@ def _determine_cmap_params(plot_data, vmin=None, vmax=None, cmap=None,
     # Handle discrete levels
     if levels is not None:
         if is_scalar(levels):
-            if user_minmax or levels == 1:
+            if user_minmax:
                 levels = np.linspace(vmin, vmax, levels)
+            elif levels == 1:
+                levels = np.asarray([(vmin + vmax) / 2])
             else:
                 # N in MaxNLocator refers to bins, not ticks
                 ticker = mpl.ticker.MaxNLocator(levels - 1)

xarray/tests/test_backends.py

@@ -1789,6 +1789,7 @@ def create_store(self):
         with create_tmp_file() as tmp_file:
             yield backends.H5NetCDFStore(tmp_file, 'w')
 
+    @pytest.mark.filterwarnings('ignore:complex dtypes are supported by h5py')
     def test_complex(self):
         expected = Dataset({'x': ('y', np.ones(5) + 1j * np.ones(5))})
         with self.roundtrip(expected) as actual:
@@ -2527,6 +2528,7 @@ class PyNioTestAutocloseTrue(PyNioTest):
 
 
 @requires_pseudonetcdf
+@pytest.mark.filterwarnings('ignore:IOAPI_ISPH is assumed to be 6370000')
 class PseudoNetCDFFormatTest(TestCase):
     autoclose = True
 
@@ -2658,14 +2660,11 @@ def test_uamiv_format_read(self):
         """
         Open a CAMx file and test data variables
         """
-        with warnings.catch_warnings():
-            warnings.filterwarnings('ignore', category=UserWarning,
-                                    message=('IOAPI_ISPH is assumed to be ' +
-                                             '6370000.; consistent with WRF'))
-            camxfile = open_example_dataset('example.uamiv',
-                                            engine='pseudonetcdf',
-                                            autoclose=True,
-                                            backend_kwargs={'format': 'uamiv'})
+
+        camxfile = open_example_dataset('example.uamiv',
+                                        engine='pseudonetcdf',
+                                        autoclose=True,
+                                        backend_kwargs={'format': 'uamiv'})
         data = np.arange(20, dtype='f').reshape(1, 1, 4, 5)
         expected = xr.Variable(('TSTEP', 'LAY', 'ROW', 'COL'), data,
                                dict(units='ppm', long_name='O3'.ljust(16),
@@ -2687,17 +2686,14 @@ def test_uamiv_format_mfread(self):
         """
         Open a CAMx file and test data variables
         """
-        with warnings.catch_warnings():
-            warnings.filterwarnings('ignore', category=UserWarning,
-                                    message=('IOAPI_ISPH is assumed to be ' +
-                                             '6370000.; consistent with WRF'))
-            camxfile = open_example_mfdataset(
-                ['example.uamiv',
-                 'example.uamiv'],
-                engine='pseudonetcdf',
-                autoclose=True,
-                concat_dim='TSTEP',
-                backend_kwargs={'format': 'uamiv'})
+
+        camxfile = open_example_mfdataset(
+            ['example.uamiv',
+             'example.uamiv'],
+            engine='pseudonetcdf',
+            autoclose=True,
+            concat_dim='TSTEP',
+            backend_kwargs={'format': 'uamiv'})
 
         data1 = np.arange(20, dtype='f').reshape(1, 1, 4, 5)
         data = np.concatenate([data1] * 2, axis=0)
@@ -2720,19 +2716,18 @@ def test_uamiv_format_mfread(self):
 
     def test_uamiv_format_write(self):
         fmtkw = {'format': 'uamiv'}
-        with warnings.catch_warnings():
-            warnings.filterwarnings('ignore', category=UserWarning,
-                                    message=('IOAPI_ISPH is assumed to be ' +
-                                             '6370000.; consistent with WRF'))
-            expected = open_example_dataset('example.uamiv',
-                                            engine='pseudonetcdf',
-                                            autoclose=False,
-                                            backend_kwargs=fmtkw)
+
+        expected = open_example_dataset('example.uamiv',
+                                        engine='pseudonetcdf',
+                                        autoclose=False,
+                                        backend_kwargs=fmtkw)
         with self.roundtrip(expected,
                             save_kwargs=fmtkw,
                             open_kwargs={'backend_kwargs': fmtkw}) as actual:
             assert_identical(expected, actual)
 
+        expected.close()
+
     def save(self, dataset, path, **save_kwargs):
         import PseudoNetCDF as pnc
         pncf = pnc.PseudoNetCDFFile()

xarray/tests/test_coding_times.py

@@ -538,7 +538,8 @@ def test_cf_datetime_nan(num_dates, units, expected_list):
     with warnings.catch_warnings():
         warnings.filterwarnings('ignore', 'All-NaN')
         actual = coding.times.decode_cf_datetime(num_dates, units)
-    expected = np.array(expected_list, dtype='datetime64[ns]')
+    # use pandas because numpy will deprecate timezone-aware conversions
+    expected = pd.to_datetime(expected_list)
     assert_array_equal(expected, actual)
 
 

xarray/tests/test_dask.py

@@ -24,8 +24,11 @@
 
 class DaskTestCase(TestCase):
     def assertLazyAnd(self, expected, actual, test):
-        with dask.set_options(get=dask.get):
+
+        with (dask.config.set(get=dask.get) if hasattr(dask, 'config')
+              else dask.set_options(get=dask.get)):
             test(actual, expected)
+
         if isinstance(actual, Dataset):
             for k, v in actual.variables.items():
                 if k in actual.dims:
@@ -196,11 +199,13 @@ def test_missing_methods(self):
         except NotImplementedError as err:
             assert 'dask' in str(err)
 
+    @pytest.mark.filterwarnings('ignore::PendingDeprecationWarning')
     def test_univariate_ufunc(self):
         u = self.eager_var
         v = self.lazy_var
         self.assertLazyAndAllClose(np.sin(u), xu.sin(v))
 
+    @pytest.mark.filterwarnings('ignore::PendingDeprecationWarning')
     def test_bivariate_ufunc(self):
         u = self.eager_var
         v = self.lazy_var
@@ -421,6 +426,7 @@ def duplicate_and_merge(array):
         actual = duplicate_and_merge(self.lazy_array)
         self.assertLazyAndEqual(expected, actual)
 
+    @pytest.mark.filterwarnings('ignore::PendingDeprecationWarning')
     def test_ufuncs(self):
         u = self.eager_array
         v = self.lazy_array
@@ -821,7 +827,8 @@ def test_basic_compute():
                 dask.multiprocessing.get,
                 dask.local.get_sync,
                 None]:
-        with dask.set_options(get=get):
+        with (dask.config.set(get=get) if hasattr(dask, 'config')
+              else dask.set_options(get=get)):
             ds.compute()
             ds.foo.compute()
             ds.foo.variable.compute()

xarray/tests/test_dataarray.py

@@ -672,6 +672,7 @@ def test_isel_types(self):
         assert_identical(da.isel(x=np.array([0], dtype="int64")),
                          da.isel(x=np.array([0])))
 
+    @pytest.mark.filterwarnings('ignore::DeprecationWarning')
     def test_isel_fancy(self):
         shape = (10, 7, 6)
         np_array = np.random.random(shape)
@@ -845,6 +846,7 @@ def test_isel_drop(self):
         selected = data.isel(x=0, drop=False)
         assert_identical(expected, selected)
 
+    @pytest.mark.filterwarnings("ignore:Dataset.isel_points")
     def test_isel_points(self):
         shape = (10, 5, 6)
         np_array = np.random.random(shape)
@@ -1237,6 +1239,7 @@ def test_reindex_like_no_index(self):
                 ValueError, 'different size for unlabeled'):
             foo.reindex_like(bar)
 
+    @pytest.mark.filterwarnings('ignore:Indexer has dimensions')
     def test_reindex_regressions(self):
         # regression test for #279
         expected = DataArray(np.random.randn(5), coords=[("time", range(5))])
@@ -1286,7 +1289,7 @@ def test_swap_dims(self):
 
     def test_expand_dims_error(self):
         array = DataArray(np.random.randn(3, 4), dims=['x', 'dim_0'],
-                          coords={'x': np.linspace(0.0, 1.0, 3.0)},
+                          coords={'x': np.linspace(0.0, 1.0, 3)},
                           attrs={'key': 'entry'})
 
         with raises_regex(ValueError, 'dim should be str or'):

xarray/tests/test_dataset.py

@@ -1240,6 +1240,7 @@ def test_isel_drop(self):
         selected = data.isel(x=0, drop=False)
         assert_identical(expected, selected)
 
+    @pytest.mark.filterwarnings("ignore:Dataset.isel_points")
     def test_isel_points(self):
         data = create_test_data()
 
@@ -1317,6 +1318,8 @@ def test_isel_points(self):
                          dim2=stations['dim2s'],
                          dim=np.array([4, 5, 6]))
 
+    @pytest.mark.filterwarnings("ignore:Dataset.sel_points")
+    @pytest.mark.filterwarnings("ignore:Dataset.isel_points")
     def test_sel_points(self):
         data = create_test_data()
 
@@ -1347,6 +1350,7 @@ def test_sel_points(self):
         with pytest.raises(KeyError):
             data.sel_points(x=[2.5], y=[2.0], method='pad', tolerance=1e-3)
 
+    @pytest.mark.filterwarnings('ignore::DeprecationWarning')
     def test_sel_fancy(self):
         data = create_test_data()
 

xarray/tests/test_missing.py

@@ -93,14 +93,14 @@ def test_interpolate_pd_compat():
 
 
 @requires_scipy
-def test_scipy_methods_function():
-    for method in ['barycentric', 'krog', 'pchip', 'spline', 'akima']:
-        kwargs = {}
-        # Note: Pandas does some wacky things with these methods and the full
-        # integration tests wont work.
-        da, _ = make_interpolate_example_data((25, 25), 0.4, non_uniform=True)
-        actual = da.interpolate_na(method=method, dim='time', **kwargs)
-        assert (da.count('time') <= actual.count('time')).all()
+@pytest.mark.parametrize('method', ['barycentric', 'krog',
+                                    'pchip', 'spline', 'akima'])
+def test_scipy_methods_function(method):
+    # Note: Pandas does some wacky things with these methods and the full
+    # integration tests wont work.
+    da, _ = make_interpolate_example_data((25, 25), 0.4, non_uniform=True)
+    actual = da.interpolate_na(method=method, dim='time')
+    assert (da.count('time') <= actual.count('time')).all()
 
 
 @requires_scipy

xarray/tests/test_plot.py

@@ -267,6 +267,7 @@ def test_datetime_dimension(self):
         assert ax.has_data()
 
     @pytest.mark.slow
+    @pytest.mark.filterwarnings('ignore:tight_layout cannot')
     def test_convenient_facetgrid(self):
         a = easy_array((10, 15, 4))
         d = DataArray(a, dims=['y', 'x', 'z'])
@@ -328,6 +329,7 @@ def test_plot_size(self):
             self.darray.plot(aspect=1)
 
     @pytest.mark.slow
+    @pytest.mark.filterwarnings('ignore:tight_layout cannot')
     def test_convenient_facetgrid_4d(self):
         a = easy_array((10, 15, 2, 3))
         d = DataArray(a, dims=['y', 'x', 'columns', 'rows'])
@@ -775,10 +777,13 @@ def test_plot_nans(self):
         clim2 = self.plotfunc(x2).get_clim()
         assert clim1 == clim2
 
+    @pytest.mark.filterwarnings('ignore::UserWarning')
+    @pytest.mark.filterwarnings('ignore:invalid value encountered')
     def test_can_plot_all_nans(self):
         # regression test for issue #1780
         self.plotfunc(DataArray(np.full((2, 2), np.nan)))
 
+    @pytest.mark.filterwarnings('ignore: Attempting to set')
     def test_can_plot_axis_size_one(self):
         if self.plotfunc.__name__ not in ('contour', 'contourf'):
             self.plotfunc(DataArray(np.ones((1, 1))))
@@ -970,6 +975,7 @@ def test_2d_function_and_method_signature_same(self):
         del func_sig['darray']
         assert func_sig == method_sig
 
+    @pytest.mark.filterwarnings('ignore:tight_layout cannot')
     def test_convenient_facetgrid(self):
         a = easy_array((10, 15, 4))
         d = DataArray(a, dims=['y', 'x', 'z'])
@@ -1001,6 +1007,7 @@ def test_convenient_facetgrid(self):
             else:
                 assert '' == ax.get_xlabel()
 
+    @pytest.mark.filterwarnings('ignore:tight_layout cannot')
     def test_convenient_facetgrid_4d(self):
         a = easy_array((10, 15, 2, 3))
         d = DataArray(a, dims=['y', 'x', 'columns', 'rows'])
@@ -1279,6 +1286,7 @@ def test_imshow_rgb_values_in_valid_range(self):
         assert out.dtype == np.uint8
         assert (out[..., :3] == da.values).all()  # Compare without added alpha
 
+    @pytest.mark.filterwarnings('ignore:Several dimensions of this array')
     def test_regression_rgb_imshow_dim_size_one(self):
         # Regression: https://github.com/pydata/xarray/issues/1966
         da = DataArray(easy_array((1, 3, 3), start=0.0, stop=1.0))
@@ -1511,6 +1519,7 @@ def test_facetgrid_polar(self):
             sharey=False)
 
 
+@pytest.mark.filterwarnings('ignore:tight_layout cannot')
 class TestFacetGrid4d(PlotTestCase):
     def setUp(self):
         a = easy_array((10, 15, 3, 2))
@@ -1538,6 +1547,7 @@ def test_default_labels(self):
             assert substring_in_axes(label, ax)
 
 
+@pytest.mark.filterwarnings('ignore:tight_layout cannot')
 class TestFacetedLinePlots(PlotTestCase):
     def setUp(self):
         self.darray = DataArray(np.random.randn(10, 6, 3, 4),