1# Copyright 2018, OpenCensus Authors 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14 15from collections import namedtuple 16 17from opencensus.tags.tag_key import TagKey 18from opencensus.tags.tag_value import TagValue 19 20Tag_ = namedtuple('Tag', ['key', 'value']) 21 22 23class Tag(Tag_): 24 """A tag, in the format [KEY]:[VALUE]. 25 26 :type key: str 27 :param key: The name of the tag 28 29 :type value: str 30 :param value: The value of the tag 31 32 """ 33 def __new__(cls, key, value): 34 return super(Tag, cls).__new__( 35 cls, 36 key=TagKey(key), 37 value=TagValue(value), 38 ) 39