Python - convert string to date

The standard module datetime in Python can convert strings to dates

from datetime import datetime

text = '2012-09-20'

y = datetime.strptime(text, '%Y-%m-% d')

print(y)

z = datetime.now()

diff = z - y

print(diff)

Output in a specific format

nice_z = datetime.strftime(z, '%A %B %d, %Y')

print(nice_z)

datetime.strftime performance is very poor, write a function below

from datetime import datetime

def parse_ymd(s):

year_s, mon _s , day_s = s.split('-')

return datetime(int(year_s), int(mon_s), int(day_s))