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# ============LICENSE_START=======================================================
# org.onap.dcae
# ================================================================================
# Copyright (c) 2017 AT&T Intellectual Property. All rights reserved.
# Copyright (c) 2019 Pantheon.tech. All rights reserved.
# ================================================================================
# 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.
# ============LICENSE_END=========================================================
#
# ECOMP is a trademark and service mark of AT&T Intellectual Property.

import string
import random
import collections


def random_string(n):
    """Random generate an ascii string of "n" length"""
    corpus = string.ascii_lowercase + string.ascii_uppercase + string.digits
    return ''.join(random.choice(corpus) for x in range(n))


def update_dict(d, u):
    """Recursively updates dict

    Update dict d with dict u
    """
    for k, v in u.items():
        if isinstance(v, collections.Mapping):
            r = update_dict(d.get(k, {}), v)
            d[k] = r
        else:
            d[k] = u[k]
    return d