text: """
  Boolean Algebra.
  
  This module defines a Boolean Algebra over the set {TRUE, FALSE} with boolean
  variables and the boolean functions AND, OR, NOT. For extensive documentation
  look either into the docs directory or view it online, at
  https://booleanpy.readthedocs.org/en/latest/.
  
  Copyright (c) 2009-2020 Sebastian Kraemer, basti.kr@gmail.com and others
  SPDX-License-Identifier: BSD-2-Clause
  """
  
  from __future__ import absolute_import
  from __future__ import unicode_literals
  from __future__ import print_function
  
  from boolean.boolean import BooleanAlgebra
  
  from boolean.boolean import Expression
  from boolean.boolean import Symbol
  from boolean.boolean import ParseError
  from boolean.boolean import PARSE_ERRORS
  
  from boolean.boolean import AND
  from boolean.boolean import NOT
  from boolean.boolean import OR
  
  from boolean.boolean import TOKEN_TRUE
  from boolean.boolean import TOKEN_FALSE
  from boolean.boolean import TOKEN_SYMBOL
  
  from boolean.boolean import TOKEN_AND
  from boolean.boolean import TOKEN_OR
  from boolean.boolean import TOKEN_NOT
  
  from boolean.boolean import TOKEN_LPAR
  from boolean.boolean import TOKEN_RPAR
  