Generate simple year month list

gistfile1.py

# -*- coding:utf-8 -*-
from datetime import date


class YearMonth(object):
    """ List year/month from specified to today """
    def __init__(self, year, month, format='%Y/%m'):
        self.year = year
        self.month = month
        self.format = format

    def __iter__(self):
        """ Generate year/month list dynamically. """
        specified_month = date(self.year, self.month, 1)
        month = date.today().replace(day=1)

        while month >= specified_month:
            s = month.strftime(self.format)
            yield (s, s)
            y = month.year
            m = month.month
            if m == 1:
                month = month.replace(year=(y - 1), month=12)
            else:
                month = month.replace(month=(m - 1))