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Python Functional Python Functional Workhorses Map and Filter

Diego Salas Polar
Diego Salas Polar
21,431 Points
Posted by Diego Salas Polar
Diego Salas Polar
21,431 Points

I can't figure this one out by myself. I need help, and I keep getting Bummer! Try again!

I don't know what I am doing.

birthdays.py 
import datetime


birthdays = [
    datetime.datetime(2012, 4, 29),
    datetime.datetime(2006, 8, 9),
    datetime.datetime(1978, 5, 16),
    datetime.datetime(1981, 8, 15),
    datetime.datetime(2001, 7, 4),
    datetime.datetime(1999, 12, 30)
]

today = datetime.datetime.today()

def is_over_13(datetime):
    return today.year*365 - datetime.year*365 >= 4745

def date_string(eday):
    return eday.strftime('%B %d')

birth_dates = sorted(
    filter(date_string, map(is_over_13, birthdays))

)

1 Answer

John Lindsey
John Lindsey
15,641 Points
John Lindsey
John Lindsey
15,641 Points

Here is the code for the last part:

birth_dates = map(date_string, filter(is_over_13, birthdays))

First you will need to filter out the birthdays under 13 by using filter(). This will only return the truthy values. Then you can map all of these values returned for the date_string function.