50 lines
1.9 KiB
Python
50 lines
1.9 KiB
Python
# Copyright (C) 2018 AT&T
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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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def get_list_from_ranges_str(ranges_str):
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"""Convert the range in string format to ranges list
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And yield the merged ranges in order. The argument must be a
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string having comma separated vlan and vlan-ranges.
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get_list_from_ranges_str("4,6,10-13,25-27,100-103")
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[4, 6, 10, 11, 12, 13, 25, 26, 27, 100, 101, 102, 103]
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"""
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return sum(((list(range(*[int(range_start) + range_index
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for range_index, range_start in
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enumerate(range_item.split('-'))]))
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if '-' in range_item else [int(range_item)])
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for range_item in ranges_str.split(',')), [])
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def get_ranges_str_from_list(ranges):
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"""Convert the ranges list to string format
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And yield the merged ranges in order in string format.
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The argument must be an iterable of pairs (start, stop).
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get_ranges_str_from_list([4, 11, 12, 13, 25, 26, 27, 101, 102, 103])
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"4,11-13,25-27,101-103"
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"""
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ranges_str = []
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for val in sorted(ranges):
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if not ranges_str or ranges_str[-1][-1] + 1 != val:
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ranges_str.append([val])
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else:
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ranges_str[-1].append(val)
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return ",".join([str(range_item[0]) if len(range_item) == 1
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else str(range_item[0]) + "-" + str(range_item[-1])
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for range_item in ranges_str])
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