Extracts date of birth from polish PESEL identifier

pesel_do_date.py

# -*- coding: utf-8                                                                                                                                           
import datetime

def dob_from_pesel(pesel):
    # based on http://dev.cdur.pl/Artykuly/Pobieranie-daty-urodzenia-i-plci-z-numeru-PESEL-Javascript                                                         
    year = 1900 + int(pesel[0:2])
    if 2 <= int(pesel[2]) < 8:
        year += (int(pesel[2]) / 2) * 100
    if int(pesel[2]) >= 8:
        year -= 100
    month = (int(pesel[2]) % 2) * 10 + int(pesel[3])
    day = int(pesel[4:6])
    return datetime.date(year, month, day)