def splitDataFrameIntoSmaller(df, chunkSize = 1600):
    """
    Splits dataframe to smaller chunks 
    """
    listOfDf = list()
    numberChunks = len(df) // chunkSize + 1
    for i in range(numberChunks):
        listOfDf.append(df[i*chunkSize:(i+1)*chunkSize])
    return listOfDf