将年中的第几天 integer 转换为 Python 中的日期和月份整数

Question

I have an integer representing the day of the year from 1-365 in my array out at index 0. How do i convert this to get the month and day of month from this using Python and Pandas?

I have tried:

out[0] = pd.to_datetime(out[0]).dt.strftime('%m-%d')

but I get an error saying AttributeError: 'Timestamp' object has no attribute 'dt'

Answer 1

You have to know if it's a leap year or not? If it's a leap year, February has 29 days, if not 28. Otherwise your conversion will not be correct.

Leap Years are any year that can be exactly divided by 4 (such as 2016, 2020, 2024, etc) except if it can be exactly divided by 100, then it isn't (such as 2100, 2200, etc) except if it can be exactly divided by 400, then it is (such as 2000, 2400)