CODEWITHSUNDEEP
pythonpython-3.xdatetime
Samael Olascoaga
Samael Olascoaga

Reputation: 161

Convert datetime to ordinal in python fails

i been had worked with dates. I want to convert datetimes to ordinal but my script fails.

from datetime import datetime

date = "2016/12/07 17:45"
date_strip = datetime.strptime(date, '%Y/%m/%d %H:%M').date()
ordinal = date_strip.toordinal()
# ordinal = 736305
normal_date = datetime.fromordinal(ordinal)
# normal_date = 2016-12-07 00:00:00 not 2016-12-07 17:45:00

whats wrong? ca they help me please?

Upvotes: 1

Views: 3480

Answers (2)

SparkAndShine
SparkAndShine

Reputation: 18027

datetime.date() returns date object with same year, month and day, but not the hour, minute and second, i.e day resolution. It can be easily seen below.

>>> from datetime import datetime
>>> s = "2016/12/07 17:45"
>>> d = datetime.strptime(s, '%Y/%m/%d %H:%M').date()
>>> type(d)
<type 'datetime.date'>

Notice that datetime.toordinal is the same as self.date().toordinal().

>>> from datetime import datetime
>>> dt = datetime.strptime('2016/12/07 17:45', '%Y/%m/%d %H:%M')
>>> dt.toordinal() == dt.date().toordinal()
True

Upvotes: 0

TemporalWolf
TemporalWolf

Reputation: 7952

Because ordinal stores just the date. the ordinal cannot contain the time:

the proleptic Gregorian ordinal of the date, where January 1 of year 1 has ordinal 1. For any date object d, date.fromordinal(d.toordinal()) == d.

If you want to convert to/from timestamps instead of ordinals, try this so answer.

Upvotes: 1

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