74 lines
1.7 KiB
Python
74 lines
1.7 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import random
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import string
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from six import PY3
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from six.moves import range
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_string_with_symbols = (
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string.digits + string.ascii_letters + ".,;:^&*-_+=#~@"
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)
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def random_string(length):
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return ''.join(random.choice(string.ascii_letters) for _ in range(length))
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def random_string_with_symbols(length):
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return ''.join(
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random.choice(_string_with_symbols) for _ in range(length)
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)
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def is_ascii(s):
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if PY3:
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if isinstance(s, bytes):
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try:
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s.decode('ascii').encode('ascii')
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except UnicodeDecodeError:
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return False
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except UnicodeEncodeError:
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return False
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return True
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try:
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s.encode("ascii")
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except UnicodeEncodeError:
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return False
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except UnicodeDecodeError:
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return False
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else:
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return True
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def to_ascii(s):
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"""Converts a string to ascii if it is ascii, otherwise leave it alone.
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If given None then will return None.
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"""
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if PY3:
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return s
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if s is None:
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return None
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try:
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return s.encode("ascii")
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except UnicodeEncodeError:
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return s
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