How to convert month index to name in python

To convert month index (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 ou 12) to name (January, February, March, April, May, June, July, August, September, October, November, December), the simplest way is to use python module calendar:

>>> import calendar
>>> month_idx = 9
>>> month_name = calendar.month_name[month_idx]
>>> month_name
'September'

another example:

>>> for month_idx in range(1,13):
...     calendar.month_name[month_idx]
... 
'January'
'February'
'March'
'April'
'May'
'June'
'July'
'August'
'September'
'October'
'November'
'December'

To change language use locale, in French for instance:

>>> import locale
>>> locale.setlocale(locale.LC_ALL, 'fr_FR')
'fr_FR'
>>> for month_idx in range(1,13):
...     calendar.month_name[month_idx]
... 
'janvier'
'février'
'mars'
'avril'
'mai'
'juin'
'juillet'
'août'
'septembre'
'octobre'
'novembre'
'décembre'

References