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# -------------------------------------------------------------------------
# Copyright (c) 2015-2017 AT&T Intellectual Property
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# -------------------------------------------------------------------------
#
import itertools
from collections import defaultdict
from dateutil import tz
from dateutil.parser import parse
def tuples_to_multi_val_dict(kvw_tuples, colnums=(0, 1)):
"""Given a list of k,v tuples, get a dictionary of the form k -> [v1,v2,...,vn]
:param kvw_tuples: list of k,v,w tuples (e.g. [(k1,v1,a1), (k2,v2,a2), (k1,v3,a3), (k1,v4,a4)]
:param colnums: column numbers
:return: a dict of str:set, something like {k1: {v1, v3, v4}, k2: {v2}} or {k1: {a1, a3, a4}, k2: {a2}}
"""
res = defaultdict(set)
for x in kvw_tuples:
key, val = x[colnums[0]], x[colnums[1]]
res[key].add(val)
return dict((k, set(v)) for k, v in res.items())
def tuples_to_dict(kvw_tuples, colnums=(0, 1)):
"""Given a list of k,v tuples, get a dictionary of the form k -> v
:param kvw_tuples: list of k,v,w tuples (e.g. [(k1,v1,a1), (k2,v2,a2), (k3,v3,a3), (k1,v4,a4)]
:param colnums: column numbers
:return: a dict; something like {k1: v4, k2: v2, k3: v3} (note, k1 is repeated, so last val is retained)
"""
return dict((x[colnums[0]], x[colnums[1]]) for x in kvw_tuples)
def utc_time_from_ts(timestamp):
"""Return corresponding UTC timestamp for a given ISO timestamp (or anything that parse accepts)"""
return parse(timestamp).astimezone(tz.tzutc()).strftime('%Y-%m-%d %H:%M:%S')
def list_flatten(l):
"""Flatten a complex nested list of nested lists into a flat list"""
return itertools.chain(*[list_flatten(j) if isinstance(j, list) else [j] for j in l])
text_to_symbol = {
'greater': ">",
'less': "<",
'equal': "="
}
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