Add vertical submodule (#21)

Author: sandorkertesz

src/earthkit/meteo/vertical/__init__.py

@@ -0,0 +1,19 @@
+# (C) Copyright 2021 ECMWF.
+#
+# This software is licensed under the terms of the Apache Licence Version 2.0
+# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
+# In applying this licence, ECMWF does not waive the privileges and immunities
+# granted to it by virtue of its status as an intergovernmental organisation
+# nor does it submit to any jurisdiction.
+#
+
+"""
+Vertical computation functions.
+
+The API is split into two levels. The low level functions are in the ``array`` submodule and they
+can be used to operate on numpy arrays. The high level functions are still to be developed and
+planned to work with objects like *earthkit.data FieldLists* or *xarray DataSets*.
+"""
+
+
+from .vertical import *  # noqa

src/earthkit/meteo/vertical/array/__init__.py

@@ -0,0 +1,14 @@
+# (C) Copyright 2021 ECMWF.
+#
+# This software is licensed under the terms of the Apache Licence Version 2.0
+# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
+# In applying this licence, ECMWF does not waive the privileges and immunities
+# granted to it by virtue of its status as an intergovernmental organisation
+# nor does it submit to any jurisdiction.
+#
+
+"""
+Vertical computation functions operating on numpy arrays.
+"""
+
+from .vertical import *  # noqa

src/earthkit/meteo/vertical/array/vertical.py

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+# (C) Copyright 2021 ECMWF.
+#
+# This software is licensed under the terms of the Apache Licence Version 2.0
+# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
+# In applying this licence, ECMWF does not waive the privileges and immunities
+# granted to it by virtue of its status as an intergovernmental organisation
+# nor does it submit to any jurisdiction.
+#

src/earthkit/meteo/vertical/vertical.py

@@ -0,0 +1,10 @@
+# (C) Copyright 2021 ECMWF.
+#
+# This software is licensed under the terms of the Apache Licence Version 2.0
+# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
+# In applying this licence, ECMWF does not waive the privileges and immunities
+# granted to it by virtue of its status as an intergovernmental organisation
+# nor does it submit to any jurisdiction.
+#
+
+# from . import array