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