def parse_input_csv(filename):
    """
    CSV file has 4 lines
    1. User variable name
    2. Min value
    3. Max value
    4. Step value
    """
    file = open(filename)
    lines = file.readlines()
    assert(len(lines) == 4)
    vars  = list(map(lambda x: x.strip(), lines[0].split(',')))
    mins  = list(map(lambda x: x.strip(), lines[1].split(',')))
    maxs  = list(map(lambda x: x.strip(), lines[2].split(',')))
    steps = list(map(lambda x: x.strip(), lines[3].split(',')))
    return (vars, mins, maxs, steps)