python - Subtract dates in Django? -

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i have 2 datefield variables , subtract them , return difference number of months nearest month. how might this?

thanks help!

for definite answer using calendar month lengths:

months = lambda a, b: abs((a.year - b.year) * 12 + a.month - b.month)

example:

>>> import datetime >>> = datetime.date(2011, 2, 8) >>> b = datetime.date(2010, 5, 14) >>> months(a, b) 9

edit, if want round based on days too:

months = lambda a, b: abs((a.year - b.year) * 12 + a.month - b.month) + int(abs(a.day - b.day) > 15)

example:

>>> import datetime >>> = datetime.date(2011, 2, 8) >>> b = datetime.date(2010, 5, 14) >>> months(a, b) 9 >>> b = datetime.date(2010, 5, 30) >>> months(a, b) 10

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