Merge branch 'master' into fix/4107

* master:
  Add initial cupy tests (pydata#4214)
  Add 0.16.0 release summary
  New whatsnew section
  Release v0.16.0
  Minor reorg of whatsnew for 0.16.0 (pydata#4216)
  fix sphinx warnings (pydata#4199)
  pin isort (pydata#4206)
  get the colorbar label via public methods (pydata#4201)
  Bump minimum versions for 0.16 release (pydata#4175)
  Allow passing axis kwargs to plot (pydata#4020)
  Fix to_unstacked_dataset for single dimension variables. (pydata#4094)
  Improve the speed of from_dataframe with a MultiIndex (by 40x!) (pydata#4184)
  More pint compatibility: silence UnitStrippedWarnings (pydata#4163)
  Fix typo (pydata#4192)
  use the latest image of RTD (pydata#4191)

Author: dcherian

asv_bench/benchmarks/pandas.py

@@ -0,0 +1,24 @@
+import numpy as np
+import pandas as pd
+
+from . import parameterized
+
+
+class MultiIndexSeries:
+    def setup(self, dtype, subset):
+        data = np.random.rand(100000).astype(dtype)
+        index = pd.MultiIndex.from_product(
+            [
+                list("abcdefhijk"),
+                list("abcdefhijk"),
+                pd.date_range(start="2000-01-01", periods=1000, freq="B"),
+            ]
+        )
+        series = pd.Series(data, index)
+        if subset:
+            series = series[::3]
+        self.series = series
+
+    @parameterized(["dtype", "subset"], ([int, float], [True, False]))
+    def time_to_xarray(self, dtype, subset):
+        self.series.to_xarray()

ci/requirements/py36-min-all-deps.yml

@@ -15,22 +15,21 @@ dependencies:
   - cfgrib=0.9
   - cftime=1.0
   - coveralls
-  - dask=2.5
-  - distributed=2.5
+  - dask=2.9
+  - distributed=2.9
   - flake8
   - h5netcdf=0.7
   - h5py=2.9  # Policy allows for 2.10, but it's a conflict-fest
   - hdf5=1.10
   - hypothesis
   - iris=2.2
-  - isort
+  - isort=4.3.21
   - lxml=4.4  # Optional dep of pydap
   - matplotlib=3.1
-  - msgpack-python=0.6  # remove once distributed is bumped. distributed GH3491
   - mypy=0.761  # Must match .pre-commit-config.yaml
   - nc-time-axis=1.2
   - netcdf4=1.4
-  - numba=0.44
+  - numba=0.46
   - numpy=1.15
   - pandas=0.25
   # - pint  # See py36-min-nep18.yml

ci/requirements/py36-min-nep18.yml

@@ -6,17 +6,15 @@ dependencies:
   # require drastically newer packages than everything else
   - python=3.6
   - coveralls
-  - dask=2.5
-  - distributed=2.5
-  - msgpack-python=0.6  # remove once distributed is bumped. distributed GH3491
+  - dask=2.9
+  - distributed=2.9
   - numpy=1.17
   - pandas=0.25
+  - pint=0.13
   - pip
   - pytest
   - pytest-cov
   - pytest-env
   - scipy=1.2
   - setuptools=41.2
   - sparse=0.8
-  - pip:
-      - pint==0.13

ci/requirements/py36.yml

@@ -19,7 +19,7 @@ dependencies:
   - hdf5
   - hypothesis
   - iris
-  - isort
+  - isort=4.3.21
   - lxml    # Optional dep of pydap
   - matplotlib
   - mypy=0.761  # Must match .pre-commit-config.yaml
@@ -28,6 +28,7 @@ dependencies:
   - numba
   - numpy
   - pandas
+  - pint
   - pip
   - pseudonetcdf
   - pydap
@@ -44,4 +45,3 @@ dependencies:
   - zarr
   - pip:
     - numbagg
-    - pint

ci/requirements/py37-windows.yml

@@ -19,7 +19,7 @@ dependencies:
   - hdf5
   - hypothesis
   - iris
-  - isort
+  - isort=4.3.21
   - lxml    # Optional dep of pydap
   - matplotlib
   - mypy=0.761  # Must match .pre-commit-config.yaml
@@ -28,6 +28,7 @@ dependencies:
   - numba
   - numpy
   - pandas
+  - pint
   - pip
   - pseudonetcdf
   - pydap
@@ -44,4 +45,3 @@ dependencies:
   - zarr
   - pip:
     - numbagg
-    - pint

ci/requirements/py37.yml

@@ -19,7 +19,7 @@ dependencies:
   - hdf5
   - hypothesis
   - iris
-  - isort
+  - isort=4.3.21
   - lxml    # Optional dep of pydap
   - matplotlib
   - mypy=0.761  # Must match .pre-commit-config.yaml
@@ -28,6 +28,7 @@ dependencies:
   - numba
   - numpy
   - pandas
+  - pint
   - pip
   - pseudonetcdf
   - pydap
@@ -44,4 +45,3 @@ dependencies:
   - zarr
   - pip:
     - numbagg
-    - pint

ci/requirements/py38-all-but-dask.yml

@@ -16,7 +16,7 @@ dependencies:
   - h5py
   - hdf5
   - hypothesis
-  - isort
+  - isort=4.3.21
   - lxml    # Optional dep of pydap
   - matplotlib
   - mypy=0.761  # Must match .pre-commit-config.yaml
@@ -25,6 +25,7 @@ dependencies:
   - numba
   - numpy
   - pandas
+  - pint
   - pip
   - pseudonetcdf
   - pydap
@@ -41,4 +42,3 @@ dependencies:
   - zarr
   - pip:
     - numbagg
-    - pint

ci/requirements/py38.yml

@@ -19,7 +19,7 @@ dependencies:
   - hdf5
   - hypothesis
   - iris
-  - isort
+  - isort=4.3.21
   - lxml    # Optional dep of pydap
   - matplotlib
   - mypy=0.780  # Must match .pre-commit-config.yaml
@@ -28,6 +28,7 @@ dependencies:
   - numba
   - numpy
   - pandas
+  - pint
   - pip
   - pseudonetcdf
   - pydap
@@ -44,4 +45,3 @@ dependencies:
   - zarr
   - pip:
     - numbagg
-    - pint

doc/api.rst

@@ -360,7 +360,6 @@ Computation
    DataArray.rolling_exp
    DataArray.weighted
    DataArray.coarsen
-   DataArray.dt
    DataArray.resample
    DataArray.get_axis_num
    DataArray.diff
@@ -369,7 +368,6 @@ Computation
    DataArray.differentiate
    DataArray.integrate
    DataArray.polyfit
-   DataArray.str
    DataArray.map_blocks
 
 

doc/plotting.rst

@@ -743,12 +743,13 @@ This script will plot the air temperature on a map.
 
     air = xr.tutorial.open_dataset("air_temperature").air
 
-    ax = plt.axes(projection=ccrs.Orthographic(-80, 35))
-    air.isel(time=0).plot.contourf(ax=ax, transform=ccrs.PlateCarree())
-    ax.set_global()
+    p = air.isel(time=0).plot(
+        subplot_kws=dict(projection=ccrs.Orthographic(-80, 35), facecolor="gray"),
+        transform=ccrs.PlateCarree())
+    p.axes.set_global()
 
     @savefig plotting_maps_cartopy.png width=100%
-    ax.coastlines()
+    p.axes.coastlines()
 
 When faceting on maps, the projection can be transferred to the ``plot``
 function using the ``subplot_kws`` keyword. The axes for the subplots created