parameters: (title=None, message=None, **options)
return_statement: return s == YES
docstring: Ask a question; return true if the answer is yes, None if cancelled.
docstring_summary: Ask a question; return true if the answer is yes, None if cancelled.
docstring_tokens: Ask a question ; return true if the answer is yes None if cancelled .
function: def askyesnocancel(title=None, message=None, **options):
      "Ask a question; return true if the answer is yes, None if cancelled."
      s = _show(title, message, QUESTION, YESNOCANCEL, **options)
      # s might be a Tcl index object, so convert it to a string
      s = str(s)
      if s == CANCEL:
          return None
      return s == YES
function_tokens: def askyesnocancel ( title = None , message = None , * * options ) : s = _show ( title , message , QUESTION , YESNOCANCEL , * * options ) # s might be a Tcl index object, so convert it to a string s = str ( s ) if s == CANCEL : return None return s == YES