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44 lines
1.3 KiB
Python
44 lines
1.3 KiB
Python
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2014 IBM Corporation
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# Copyright 2015-2016 Lenovo
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import re
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numregex = re.compile('([0-9]+)')
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def naturalize_string(key):
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"""Analyzes string in a human way to enable natural sort
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:param key: The node name to analyze
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:returns: A structure that can be consumed by 'sorted'
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"""
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return [int(text) if text.isdigit() else text.lower()
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for text in re.split(numregex, key)]
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def natural_sort(iterable):
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"""Return a sort using natural sort if possible
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:param iterable:
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:return:
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"""
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try:
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return sorted(iterable, key=naturalize_string)
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except TypeError:
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# The natural sort attempt failed, fallback to ascii sort
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return sorted(iterable)
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