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util.py
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util.py
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# Copyright 2018 VyOS maintainers and contributors <maintainers@vyos.io>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <http://www.gnu.org/licenses/>.
import re
def colon_separated_to_dict(data_string, uniquekeys=False):
""" Converts a string containing newline-separated entries
of colon-separated key-value pairs into a dict.
Such files are common in Linux /proc filesystem
Args:
data_string (str): data string
uniquekeys (bool): whether to insist that keys are unique or not
Returns: dict
Raises:
ValueError: if uniquekeys=True and the data string has
duplicate keys.
Note:
If uniquekeys=True, then dict entries are always strings,
otherwise they are always lists of strings.
"""
key_value_re = re.compile('([^:]+)\s*\:\s*(.*)')
data_raw = re.split('\n', data_string)
data = {}
for l in data_raw:
l = l.strip()
if l:
match = re.match(key_value_re, l)
if match:
key = match.groups()[0].strip()
value = match.groups()[1].strip()
if key in data.keys():
if uniquekeys:
raise ValueError("Data string has duplicate keys: {0}".format(key))
else:
data[key].append(value)
else:
if uniquekeys:
data[key] = value
else:
data[key] = [value]
else:
pass
return data

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