text: # Copyright IBM Corp, 2016
  #
  # 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.
  
  from copy import deepcopy
  from django import template
  
  
  register = template.Library()
  
  
  @register.filter
  def reject(value, arg):
      assert isinstance(value, list), "value must be a list: %r" % value
      assert isinstance(arg, basestring), "arg must be a string: %r" % arg
      value_copy = deepcopy(value)
      try:
          value_copy.remove(arg)
      except ValueError:
          pass
      return value_copy
  