Allow specifying a table header for the value column in print_dict

If you can provide a customer header label for the property (first)
column in the print_dict output you should also be able to provide a
customer header label for the value (second) column.

Partial-Bug: #1503841

Change-Id: Iaa96b80249389fdf12ffbaf84073debebca4b5a4

openstack/common/cliutils.py

@@ -186,14 +186,15 @@ def print_list(objs, fields, formatters=None, sortby_index=0,
         print(encodeutils.safe_encode(pt.get_string(**kwargs)))
 
 
-def print_dict(dct, dict_property="Property", wrap=0):
+def print_dict(dct, dict_property="Property", wrap=0, dict_value='Value'):
     """Print a `dict` as a table of two columns.
 
     :param dct: `dict` to print
     :param dict_property: name of the first column
     :param wrap: wrapping for the second column
+    :param dict_value: header label for the value (second) column
     """
-    pt = prettytable.PrettyTable([dict_property, 'Value'])
+    pt = prettytable.PrettyTable([dict_property, dict_value])
     pt.align = 'l'
     for k, v in six.iteritems(dct):
         # convert dict to str to check length

tests/unit/test_cliutils.py

@@ -588,6 +588,24 @@ class PrintResultStringTestCase(test_base.BaseTestCase):
 | K        | k     |
 | Key      | Value |
 +----------+-------+
+'''
+        self.assertEqual(expected, out)
+
+    def test_print_dict_string_custom_headers(self):
+        orig = sys.stdout
+        sys.stdout = six.StringIO()
+        cliutils.print_dict({"K": "k", "Key": "Value"}, dict_property='Foo',
+                            dict_value='Bar')
+        out = sys.stdout.getvalue()
+        sys.stdout.close()
+        sys.stdout = orig
+        expected = '''\
++-----+-------+
+| Foo | Bar   |
++-----+-------+
+| K   | k     |
+| Key | Value |
++-----+-------+
 '''
         self.assertEqual(expected, out)