CAT-SOOP is a flexible, programmable learning management system based on the Python programming language. https://catsoop.mit.edu
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  1. # This file is part of CAT-SOOP
  2. # Copyright (c) 2011-2020 by The CAT-SOOP Developers <catsoop-dev@mit.edu>
  3. #
  4. # This program is free software: you can redistribute it and/or modify it under
  5. # the terms of the GNU Affero General Public License as published by the Free
  6. # Software Foundation, either version 3 of the License, or (at your option) any
  7. # later version.
  8. #
  9. # This program is distributed in the hope that it will be useful, but WITHOUT
  10. # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  11. # FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
  12. # details.
  13. #
  14. # You should have received a copy of the GNU Affero General Public License
  15. # along with this program. If not, see <http://www.gnu.org/licenses/>.
  16. tutor.qtype_inherit("expression")
  17. defaults["csq_render_result"] = False
  18. def _input_check(src, tree):
  19. if tree[0] == "NUMBER":
  20. return None
  21. if tree[0] == "/" and tree[1][0] == "NUMBER" and tree[2][0] == "NUMBER":
  22. return None
  23. return "Your input must be a single number or simple fraction."
  24. defaults["csq_input_check"] = _input_check