Python Question: Year and Day of Year to date?

问题

I have a year value and a day of year and would like to convert to a date (day/month/year).

Thanks in advance. :)

回答1:

datetime.datetime(year, 1, 1) + datetime.timedelta(days - 1)

回答2:

>>> import datetime
>>> datetime.datetime.strptime('2010 120', '%Y %j')
datetime.datetime(2010, 4, 30, 0, 0)
>>> _.strftime('%d/%m/%Y')
'30/04/2010'

回答3:

The toordinal() and fromordinal() functions of the date class could be used:

from datetime import date
date.fromordinal(date(year, 1, 1).toordinal() + days - 1)

回答4:

>>>import datetime
>>>year = int(input())
>>>month = int(input())
>>>day = int(input())
data = datetime.datetime(year,month,day)
daynew = data.toordinal()
yearstart = datetime.datetime(year,1,1)
day_yearstart = yearstart.toordinal()
print ((daynew-day_yearstart)+1)

来源：https://stackoverflow.com/questions/2427555/python-question-year-and-day-of-year-to-date