# file findingaids/utils.py
#
#   Copyright 2015 Emory University Library
#
#   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 re

# compiled regular expression for normalizing whitespace
_normalize_ws_re = re.compile(r'\s+')

def normalize_whitespace(txt):
    'Normalize whitespace in a string'
    return re.sub(_normalize_ws_re, ' ', txt)
