print "The grade point average (GPA) calculator:"
 
def get_list(prompt):
    """
    loops until acceptable data or q (quit) is given
    returns a list of the entered data
    """
    data_list = []
    while True:
        sin = raw_input(prompt)  # input(prompt) in Python3
        if sin == 'q':
            return data_list
        try:
            data = float(sin)
            data_list.append(data)
        except ValueError:
            print( "Enter numeric data!" )
 
print('')
gp_list = get_list("Enter grade point (q to quit): ")
print( gp_list )  # test
# process the list ... 
# calculate the average (sum of items divided by total items)
gpa = sum(gp_list)/len(gp_list)
 
print( "The grade point average is:", gpa )

# use module datetime to show age in days
# modified to work with Python2 and Python3
 
import datetime as dt
 
prompt = "Enter your birthday (format = mm/dd/yyyy): "
try:
    # Python2
    bd = raw_input(prompt)
except NameError:
    # Python3
    bd = input(prompt)
 
# split the bd string into month, day, year
month, day, year = bd.split("/")
 
# convert to format datetime.date(year, month, day))
birthday = dt.date(int(year), int(month), int(day))
 
# get todays date
today = dt.date.today()
 
# calculate age since birth
age = (today - birthday)
 
print( "You are %d days old!" % age.days )