def compute_month_stats(data):

    """

    function: compute_month_stats

    Given a list of strings containing weather data for one month,

    compute summary statistics for that month (maximimum temperature,

    minimum temperature, number of days with freezing temperatures,

    total precipitation) and return all this as a tuple.

    Input parameter:

    ----------------

    * data: A list of strings where each string contains one day's

    weather measurements. All of the data in the list is from a

    single month. The values are separated by commas, and each day's

    string has the same number of values. The order of these values

    is: year, month, day, high temp (Celsius), low temp (Celsius),

    and precipitation (mm).

    Output:

    -------

    * There is no output to the console from this function.

    Return value:

    -------------

    A tuple with five values is returned. The values are: the month

    number corresponding to the data, the maximum high temperature,

    the minimum low temperature, the total precipitation for the

    month (rounded to one decimal place), and the number of days

    having freezing or below-freezing temperatures (i.e., 0.0 C or

    lower).

    """

    #declaring all needed variables

    month=0

    max_hi_temp=None

    min_low_temp=None

    total_precip=0

    num_days_freezing=0

    #validating length

    if len(data)>0:

        #extracting month from the first record

        #{splitting by comma, taking element at index 1, converting to int}

        month=int(data[0].split(',')[1])

        #looping through each day in data

        for day in data:

            #splitting by comma

            fields=day.split(',')

            #finding hi temperature (value at index 3, converted to float)

            hi_temp=float(fields[3])

            #finding low temperature

            low_temp=float(fields[4])

            #finding precipitation

            precip=float(fields[5])

            #if max_hi_temp is not initialized or is less than hi_temp

            #updating max_hi_temp

            if max_hi_temp==None or max_hi_temp<hi_temp:

                max_hi_temp=hi_temp

            # if min_low_temp is not initialized or is greater than low_temp

            # updating min_low_temp

            if min_low_temp==None or min_low_temp>low_temp:

                min_low_temp=low_temp

            #adding precip to total precipitation

            total_precip+=precip

            #if low temp is less than or equal to 0, incrementing num_days_freezing

            if low_temp<=0:

                num_days_freezing+=1

        #returning a tuple containing everything, (total_precip rounded to 2 places)

        return (month,max_hi_temp,min_low_temp,round(total_precip,2),num_days_freezing)

    return None # data is empty

def main():

    weather_data = [WEATHER_LIST_01, WEATHER_LIST_02]

    for month_data in weather_data:

        stats = compute_month_stats(month_data)

        for val in stats[:-1]:

            print(val, ",", sep="", end="")

        print(stats[-1])

main()