109 lines
3.2 KiB
Python
109 lines
3.2 KiB
Python
# Copyright 2017 Red Hat, Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import logging
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from sushy import exceptions
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LOG = logging.getLogger(__name__)
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def revert_dictionary(dictionary):
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"""Given a dictionary revert it's mapping
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:param dictionary: A dictionary to be reverted
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:returns: A dictionary with the keys and values reverted
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"""
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return {v: k for k, v in dictionary.items()}
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def get_members_identities(members):
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"""Extract and return a tuple of members identities
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:param members: A list of members in JSON format
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:returns: A tuple containing the members paths
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"""
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members_list = []
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for member in members:
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path = member.get('@odata.id')
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if not path:
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LOG.warning('Could not find the \'@odata.id\' attribute for '
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'member %s', member)
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continue
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members_list.append(path.rstrip('/'))
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return tuple(members_list)
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def int_or_none(x):
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"""Given a value x it cast as int or None
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:param x: The value to transform and return
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:returns: Either None or x cast to an int
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"""
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if x is None:
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return None
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return int(x)
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def get_sub_resource_path_by(resource, subresource_name):
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"""Helper function to find the subresource path
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:param resource: ResourceBase instance on which the name
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gets queried upon.
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:param subresource_name: name of the resource field to
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fetch the '@odata.id' from.
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"""
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if not subresource_name:
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raise ValueError('"subresource_name" cannot be empty')
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if not isinstance(subresource_name, list):
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subresource_name = [subresource_name]
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body = resource.json
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for path_item in subresource_name:
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body = body.get(path_item, {})
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if not body:
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raise exceptions.MissingAttributeError(
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attribute='/'.join(subresource_name), resource=resource.path)
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if '@odata.id' not in body:
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raise exceptions.MissingAttributeError(
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attribute='/'.join(subresource_name) + '/@odata.id',
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resource=resource.path)
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return body['@odata.id']
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def max_safe(iterable, default=0):
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"""Helper wrapper over builtin max() function.
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This function is just a wrapper over builtin max() w/o ``key`` argument.
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The ``default`` argument specifies an object to return if the provided
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``iterable`` is empty. Also it filters out the None type values.
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:param iterable: an iterable
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:param default: 0 by default
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"""
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try:
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return max(x for x in iterable if x is not None)
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except ValueError:
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# TypeError is not caught here as that should be thrown.
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return default
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