datetime with pyformat

pydate.py

import re
from datetime import datetime, timedelta


class Date(object):

    date_increment = re.compile('\+[0-9]+[md]')

    def __init__(self, d=None):
        self._d = d

    @classmethod
    def now(cls):
        return cls(datetime.now())

    @classmethod
    def utcnow(cls):
        return cls(datetime.utcnow())

    def __getattr__(self, k):
        return getattr(self._d, k)
 
    def __format__(self, fmt=None):
        d = self._d
        increments = self.date_increment.findall(fmt)
        for i in increments:
            p = {}
            if i[-1] == 'm':
                p['minutes'] = float(i[1:-1])
            if i[-1] == 'd':
                p['days'] = float(i[1:-1])
            d = d + timedelta(**p)
        fmt = self.date_increment.sub("", fmt)
        return d.__format__(fmt)


if __name__ == '__main__':
    n = Date.now()
    print "{now:+7d%Y-%m-%d}".format(now=n)