def caseless_string(s):
    return string(zip(s.lower(), s.upper()))
Creates and retunrs the ivtk viewer to get_viewer() function
dataset/ETHPy150Open brehaut/picoparse/picoparse/text.py/caseless_string--crossover with--dataset/ETHPy150Open enthought/mayavi/tvtk/tools/visual.py/_create_viewer