Fix missing dependecy definition of 'packaging'

.binder/environment.yml

@@ -23,6 +23,7 @@ dependencies:
   - netcdf4
   - numba
   - numpy
+  - packaging
   - pandas
   - pint
   - pip

ci/install-upstream-wheels.sh

@@ -40,6 +40,7 @@ python -m pip install \
     git+https://github.com/zarr-developers/zarr \
     git+https://github.com/Unidata/cftime \
     git+https://github.com/mapbox/rasterio \
+    git+https://github.com/pypa/packaging \
     git+https://github.com/hgrecco/pint \
     git+https://github.com/pydata/sparse \
     git+https://github.com/intake/filesystem_spec \

ci/requirements/doc.yml

@@ -19,6 +19,7 @@ dependencies:
   - netcdf4>=1.5
   - numba
   - numpy>=1.17
+  - packaging>=20.0
   - pandas>=1.0
   - pooch
   - pip

ci/requirements/environment-windows.yml

@@ -22,6 +22,7 @@ dependencies:
   - netcdf4
   - numba
   - numpy
+  - packaging
   - pandas
   - pint
   - pip

ci/requirements/environment.yml

@@ -25,6 +25,7 @@ dependencies:
   - numba
   - numexpr
   - numpy
+  - packaging
   - pandas
   - pint
   - pip

ci/requirements/py38-bare-minimum.yml

@@ -11,4 +11,5 @@ dependencies:
   - pytest-env
   - pytest-xdist
   - numpy=1.18
+  - packaging=20.0
   - pandas=1.1

ci/requirements/py38-min-all-deps.yml

@@ -33,6 +33,7 @@ dependencies:
   - netcdf4=1.5.3
   - numba=0.51
   - numpy=1.18
+  - packaging=20.0
   - pandas=1.1
   - pint=0.16
   - pip

ci/requirements/py39-all-but-dask.yml

@@ -23,6 +23,7 @@ dependencies:
   - netcdf4
   - numba
   - numpy
+  - packaging
   - pandas
   - pint
   - pip

doc/contributing.rst

@@ -274,13 +274,13 @@ Some other important things to know about the docs:
       .. ipython:: python
 
           x = 2
-          x ** 3
+          x**3
 
   will be rendered as::
 
       In [1]: x = 2
 
-      In [2]: x ** 3
+      In [2]: x**3
       Out[2]: 8
 
   Almost all code examples in the docs are run (and the output saved) during the

doc/getting-started-guide/installing.rst

@@ -8,6 +8,7 @@ Required dependencies
 
 - Python (3.8 or later)
 - `numpy <https://www.numpy.org/>`__ (1.18 or later)
+- `packaging <https://packaging.pypa.io/en/latest/#>`__ (20.0 or later)
 - `pandas <https://pandas.pydata.org/>`__ (1.1 or later)
 
 .. _optional-dependencies:

doc/whats-new.rst

@@ -33,7 +33,8 @@ Deprecations
 
 Bug fixes
 ~~~~~~~~~
-
+- Add `packaging` as a dependency to Xarray (:issue:`6216`, :pull:`6207`).
+  By `Joseph Nowak <https://github.com/josephnowak>`_ and `Joe Hamman <https://github.com/jhamman>`_.
 
 Documentation
 ~~~~~~~~~~~~~
@@ -5101,7 +5102,7 @@ Enhancements
   .. ipython:: python
 
       ds = xray.Dataset(coords={"x": range(100), "y": range(100)})
-      ds["distance"] = np.sqrt(ds.x ** 2 + ds.y ** 2)
+      ds["distance"] = np.sqrt(ds.x**2 + ds.y**2)
 
       @savefig where_example.png width=4in height=4in
       ds.distance.where(ds.distance < 100).plot()
@@ -5309,7 +5310,7 @@ Enhancements
   .. ipython:: python
 
       ds = xray.Dataset({"y": ("x", [1, 2, 3])})
-      ds.assign(z=lambda ds: ds.y ** 2)
+      ds.assign(z=lambda ds: ds.y**2)
       ds.assign_coords(z=("x", ["a", "b", "c"]))
 
   These methods return a new Dataset (or DataArray) with updated data or

setup.cfg

@@ -77,7 +77,7 @@ python_requires = >=3.8
 install_requires =
     numpy >= 1.18
     pandas >= 1.1
-    packaging
+    packaging >= 20.0
 
 [options.extras_require]
 io =

xarray/core/computation.py

@@ -944,7 +944,7 @@ def apply_ufunc(
     Calculate the vector magnitude of two arguments:
 
     >>> def magnitude(a, b):
-    ...     func = lambda x, y: np.sqrt(x ** 2 + y ** 2)
+    ...     func = lambda x, y: np.sqrt(x**2 + y**2)
     ...     return xr.apply_ufunc(func, a, b)
     ...