def range_f(begin, end, step):
    seq = []
    while True:
        if step == 0: break
        if step > 0 and begin > end: break
        if 0 < step and begin < end: break
        seq.append(begin)
        begin = begin + step
    return seq
dataset/ETHPy150Open bytefish/facerec/py/facerec/svm.py/range_f/swapped operands of `<`