old_contents: # coding: utf8
  
  #  WeasyPrint converts web documents (HTML, CSS, ...) to PDF.
  #  Copyright (C) 2011  Simon Sapin
  #
  #  This program is free software: you can redistribute it and/or modify
  #  it under the terms of the GNU Affero General Public License as
  #  published by the Free Software Foundation, either version 3 of the
  #  License, or (at your option) any later version.
  #
  #  This program 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 Affero General Public License for more details.
  #
  #  You should have received a copy of the GNU Affero General Public License
  #  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
  """
  Utility functions and methods used by various modules in the css package.
  
  """
  
  from cssutils.css import Value, DimensionValue
  
  
  def get_keyword(value):
      """If ``value`` is a keyword, return its name.
  
      Otherwise return ``None``.
  
      """
      if value.type == 'IDENT':
          return value.value
  
  
  def get_single_keyword(values):
      """If ``values`` is a 1-element list of keywords, return its name.
  
      Otherwise return ``None``.
  
      """
      # Fast but unsafe, as it depends on private attributes
      if len(values) == 1:
          value = values[0]
          if value._type == 'IDENT':
              return value._value
  
  
  def get_percentage_value(value):
      """If ``value`` is a percentage, return its value.
  
      Otherwise return ``None``.
  
      """
      if getattr(value, 'type', 'other') == 'PERCENTAGE':
          # cssutils promises that `DimensionValue.value` is an int or float
          assert isinstance(value.value, (int, float))
          return value.value
      else:
          # Not a percentage
          return None
  
  
  def as_css(values):
      """Return the string reperesentation of the ``values`` list."""
      return ' '.join(getattr(value, 'cssText', value) for value in values)
  
new_contents: # coding: utf8
  
  #  WeasyPrint converts web documents (HTML, CSS, ...) to PDF.
  #  Copyright (C) 2011  Simon Sapin
  #
  #  This program is free software: you can redistribute it and/or modify
  #  it under the terms of the GNU Affero General Public License as
  #  published by the Free Software Foundation, either version 3 of the
  #  License, or (at your option) any later version.
  #
  #  This program 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 Affero General Public License for more details.
  #
  #  You should have received a copy of the GNU Affero General Public License
  #  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
  """
  Utility functions and methods used by various modules in the css package.
  
  """
  
  
  def get_keyword(value):
      """If ``value`` is a keyword, return its name.
  
      Otherwise return ``None``.
  
      """
      if value.type == 'IDENT':
          return value.value
  
  
  def get_single_keyword(values):
      """If ``values`` is a 1-element list of keywords, return its name.
  
      Otherwise return ``None``.
  
      """
      # Fast but unsafe, as it depends on private attributes
      if len(values) == 1:
          value = values[0]
          if value._type == 'IDENT':
              return value._value
  
  
  def get_percentage_value(value):
      """If ``value`` is a percentage, return its value.
  
      Otherwise return ``None``.
  
      """
      if getattr(value, 'type', 'other') == 'PERCENTAGE':
          # cssutils promises that `DimensionValue.value` is an int or float
          assert isinstance(value.value, (int, float))
          return value.value
      else:
          # Not a percentage
          return None
  
  
  def as_css(values):
      """Return the string reperesentation of the ``values`` list."""
      return ' '.join(getattr(value, 'cssText', value) for value in values)
  
subject: Remove unused import.