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# 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.
"""Application base class for displaying data about a single object.
"""
import abc
import six
from . import display
@six.add_metaclass(abc.ABCMeta)
class ShowOne(display.DisplayCommandBase):
"""Command base class for displaying data about a single object.
"""
@property
def formatter_namespace(self):
return 'cliff.formatter.show'
@property
def formatter_default(self):
return 'table'
@abc.abstractmethod
def take_action(self, parsed_args):
"""Return a two-part tuple with a tuple of column names
and a tuple of values.
"""
def produce_output(self, parsed_args, column_names, data):
(columns_to_include, selector) = self._generate_columns_and_selector(
parsed_args, column_names)
if selector:
data = list(self._compress_iterable(data, selector))
self.formatter.emit_one(columns_to_include,
data,
self.app.stdout,
parsed_args)
return 0
def dict2columns(self, data):
"""Implement the common task of converting a dict-based object
to the two-column output that ShowOne expects.
"""
if not data:
return ({}, {})
else:
return zip(*sorted(data.items()))
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