def check_zips_len_5(df, zip_list):
    """
    Make sure all zip codes have length of 5

    df - pandas dataframe; dataframe with zip codes and other data
    zip_list - list; list of zip codes as strings
    """
    are5 = sum([len(l) == 5 for l in zip_list])
    return are5 == df.shape[0]