def mlen (mfhd) :
    mfhd.seek(0)
    return len(mfhd.readlines())-1
Creates memoized VB learning algorithm object,
dataset/ETHPy150Open taoliu/taolib/Motif/__init__.py/mlen--crossover with--dataset/ETHPy150Open daeilkim/refinery/refinery/bnpy/bnpy-dev/bnpy/learnalg/MemoizedOnlineVBLearnAlg.py/MemoizedOnlineVBLearnAlg.__init__