43 lines
1.6 KiB
Python
43 lines
1.6 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright 2014 Mirantis, Inc.
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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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import random
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import string
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def random_string(lenght, prefix='', postfix='', charset=None):
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"""Returns a random string of the specified length
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:param length: The length of the resulting string.
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:type lenght: int.
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:param prefix: Prefix for the random string.
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:type prefix: str, default: ''.
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:param postfix: Postfix for the random string.
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:type postfix: str, default ''.
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:param charset: A set of characters to use for building random strings.
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:type chartet: Iterable object. Default: ASCII letters and digits.
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:return: str
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"""
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charset = charset or string.ascii_letters + string.digits
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base_length = lenght - (len(prefix) + len(postfix))
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base = ''.join([str(random.choice(charset)) for i in range(base_length)])
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return '{prefix}{base}{postfix}'.format(prefix=prefix,
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postfix=postfix,
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base=base)
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