In [1]:

    

import datetime


    

In [2]:

    

date = datetime.date(2009, 9, 28)


    

In [3]:

    

date.month


    

    
Out[3]:





9

In [4]:

    

date.month += 1


    

    




---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-4-af084a0694b5> in <module>()
----> 1 date.month += 1

AttributeError: attribute 'month' of 'datetime.date' objects is not writable

In [5]:

    

!pip install python-dateutil


    

    




Downloading/unpacking python-dateutil
  Downloading python_dateutil-2.5.3-py2.py3-none-any.whl (201kB): 201kB downloaded
Downloading/unpacking six>=1.5 (from python-dateutil)
  Downloading six-1.10.0-py2.py3-none-any.whl
Installing collected packages: python-dateutil, six
Successfully installed python-dateutil six
Cleaning up...

In [6]:

    

from dateutil.relativedelta import relativedelta


    

In [7]:

    

date + relativedelta(months=1)


    

    
Out[7]:





datetime.date(2009, 10, 28)

In [8]:

    

def iter_month(date, increment=relativedelta(months=1)):
    while True:
        yield date
        date += increment


    

In [9]:

    

from itertools import islice


    

In [10]:

    

tuple(islice(iter_month(date), 5))


    

    
Out[10]:





(datetime.date(2009, 9, 28),
 datetime.date(2009, 10, 28),
 datetime.date(2009, 11, 28),
 datetime.date(2009, 12, 28),
 datetime.date(2010, 1, 28))