regexp_replace.py
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	# -- coding: utf-8 --
	#
	# This file is part of Invenio.
	# Copyright (C) 2013 CERN.
	#
	# Invenio is free software; you can redistribute it and/or
	# modify it under the terms of the GNU General Public License as
	# published by the Free Software Foundation; either version 2 of the
	# License, or (at your option) any later version.
	#
	# Invenio 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
	# General Public License for more details.
	#
	# You should have received a copy of the GNU General Public License
	# along with Invenio; if not, write to the Free Software Foundation, Inc.,
	# 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.

	""" Bibcheck plugin to check fields against a regular expression """

	import re

	def check_record(record, find, replace, fields, count=0):
	"""
	Replaces the occurrences of a regular expression by a string

	@param find: Regular expression to look for
	@param replace: String to substitute. Supports backreferences.
	@param fields: Fields to make the substitution on
	@param count: Maximum number of replacements to make (0 = unlimited)
	"""
	for position, value in record.iterfields(fields):
	newval = re.sub(find, replace, value, count)
	record.amend_field(position, newval)