New package: py-cdsapi (#13363)

* New package py-cdsapi to access Climate Data Store for downloading climate and weather reanalysis data

* Improvements

var/spack/repos/builtin/packages/py-cdsapi/package.py

@@ -0,0 +1,19 @@
+# Copyright 2013-2019 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class PyCdsapi(PythonPackage):
+    """The Climate Data Store Application Program Interface is a service providing programmatic access to CDS data. Get your UID and API key from the CDS portal at the address https://cds.climate.copernicus.eu/user and write it into the configuration file. Look at https://pypi.org/project/cdsapi/ for an example"""
+
+    homepage = "https://cds.climate.copernicus.eu"
+    url      = "https://pypi.io/packages/source/c/cdsapi/cdsapi-0.2.3.tar.gz"
+
+    version('0.2.3', sha256='333b31ec263224399635db9b21a2e1a50cd73451f5179f8d967437e7c9161d9b')
+
+    depends_on('py-setuptools', type='build')
+    depends_on('py-requests@2.5.0:', type=('build', 'run'))
+    depends_on('py-tqdm', type=('build', 'run'))