Example create command

Example create command and new --data option for examples.  For
example:

    python -m examples.create openstack/network/v2_0/network.py \
           --data '{"name": "foo"}'

Change-Id: Ie048f0e7d31b25e8c3df79a59d3cd73f4ce2b1b2

examples/common.py

@@ -27,6 +27,7 @@ playing with the example scripts against a running OpenStack simpler.
 """
 
 import argparse
+import json
 import logging
 import os
 import subprocess
@@ -55,6 +56,10 @@ def find_resource_cls(opts):
     return getattr(mod, class_str)
 
 
+def get_data_option(opts):
+    return json.loads(opts.data)
+
+
 def get_open_fds():
     '''Return the open file descriptors for current process
 
@@ -161,6 +166,12 @@ def option_parser():
         default=env('OS_URL'),
         help='Defaults to env[OS_URL]',
     )
+    parser.add_argument(
+        '--data',
+        metavar='<data>',
+        default='{}',
+        help='Json data for command.',
+    )
     parser.add_argument(
         '-v', '--verbose',
         action='count',

examples/create.py

@@ -0,0 +1,30 @@
+# 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 common
+from examples import session
+
+
+def run_create(opts):
+    sess = session.make_session(opts)
+    cls = common.find_resource_cls(opts)
+    obj = cls.new(**common.get_data_option(opts))
+    obj.create(sess)
+    print(str(obj))
+    return
+
+
+if __name__ == "__main__":
+    opts = common.setup()
+    sys.exit(common.main(opts, run_create))