def HKL2string(hkl):
    """
    convert hkl into string
    [-10.0,-0.0,5.0]  -> '-10,0,5'
    """
    res = ""
    for elem in hkl:
        ind = int(elem)
        strind = str(ind)
        if strind == "-0":  # removing sign before 0
            strind = "0"
        res += strind + ","

    return res[:-1]