@xfail
def test_difficulty(app):

    assert False
The index of the character relative to the beginning of the line 0..n-1
dataset/ETHPy150Open heiskr/sagefy/server/test/test_modules_sequencer_formulas.py/test_difficulty--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/antlr3/antlr3/streams.py/CharStream.getCharPositionInLine