import statistics as st
def CalcCorr(s1,s2):
    n = min(len(s1),len(s2))
    mean1 = st.mean(s1)
    mean2 = st.mean(s2)
    cov = sum((s1i - mean1) * (s2i - mean2) for s1i, s2i in zip(s1, s2)) / n
    stdS1 = st.stdev(s1)
    stdS2 = st.stdev(s2)
    if stdS1 == 0 or stdS2 == 0:
        return 0
    return cov/(stdS1*stdS2)