def singlevalue(my_series):
    """
    input: pd.series
    output: the number of single values
    """
    value = len(my_series.value_counts()[my_series.value_counts() == 1])
    return value

def df_explore(data_explore):
    """
    input: pandas dataframe
    output: 
    1. the shape of the data frame
    2. the number of unique value in each column
    3. the …