new_contents: # iso9362.py - functions for handling ISO 9362 Business identifier codes
  #
  # Copyright (C) 2015 Lifealike Ltd
  #
  # 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, write to the Free Software
  # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  # 02110-1301 USA
  
  """ISO 9362 (Business identifier codes).
  
  An ISO 9362 identifier (also: BIC, BEI, or SWIFT code) uniquely
  identifies an institution. They are commonly used to route financial
  transactions.
  
  The code consists of a 4 letter institution code, a 2 letter country code,
  and a 2 character location code, optionally followed by a three character
  branch code.
  
  >>> validate('AGRIFRPP882')
  'AGRIFRPP882'
  >>> validate('AGRIFRPP')
  'AGRIFRPP'
  >>> validate('AGRIFRPP8')
  Traceback (most recent call last):
      ...
  InvalidLength: ..
  >>> validate('AGRIF2PP')  # country code can't contain digits
  Traceback (most recent call last):
      ...
  InvalidFormat: ..
  >>> format('agriFRPP')  # conventionally caps
  'AGRIFRPP'
  
  """
  
  import re
  
  from stdnum.exceptions import *
  from stdnum.util import clean
  
  _bic_re = re.compile(r'^[a-z]{6}[0-9a-z]{2}([0-9a-z]{3})?$', re.IGNORECASE)
  
  
  def compact(number):
      """Convert the number to the minimal representation. This strips the
      number of any surrounding whitespace."""
      number = clean(number).strip()
      return number
  
  
  def validate(number):
      """Checks to see if the number provided is a valid routing number. This
      checks the length and characters in each position."""
      number = compact(number)
      if len(number) not in (8, 11):
          raise InvalidLength()
      match = _bic_re.search(number)
      if not match:
          raise InvalidFormat()
      return number
  
  
  def is_valid(number):
      """Checks to see if the number provided is a valid BIC. This checks the
       length and characters in each position."""
      try:
          return bool(validate(number))
      except ValidationError:
          return False
  
  
  def format(number):
      """Reformat the passed number to the standard format."""
      number = compact(number)
      return number.upper()
  
subject: Add ISO 9362 (BIC) support