Example session command

Example session command added.

If you have your authorization information in your environment,
you may run the command like this:

python -m examples.session /tenants

Change-Id: I8d7a4568f504472ab035e2f455f9870750a9dde9

examples/session.py

@@ -0,0 +1,40 @@
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+import sys
+
+from examples import authenticate
+from examples import common
+from examples import transport
+from openstack.auth import service_filter
+from openstack import session
+
+
+def make_session(opts):
+    xport = transport.make_transport(opts)
+    auth = authenticate.make_authenticate(opts)
+    return session.Session(xport, auth)
+
+
+def run_session(opts):
+    """Create session."""
+    argument = opts.argument
+    sess = make_session(opts)
+    filtration = service_filter.ServiceFilter('Identity')
+    print("Session: %s" % sess)
+    print(sess.get(argument, service=filtration).text)
+    return
+
+
+if __name__ == "__main__":
+    opts = common.setup()
+    sys.exit(common.main(opts, run_session))