mxDateTime package question

[Prashant Pai]

I have a Julian (?) date string '2000238' (format YYYYDDD) which
corresponds to 2000/08/25

How do I create a correct DateTime object with this?

thanks

 

[Steve Holden]

I have a Julian (?) date string '2000238' (format YYYYDDD) which
corresponds to 2000/08/25

How do I create a correct DateTime object with this?

thanks

You could try

>>> jd = "2000238"
>>> y = int(jd[:4])
>>> d = int(jd[4:])-1
>>> yd = mx.DateTime.DateTime(y)
>>> dinc = mx.DateTime.DateTimeDeltaFromDays(d)
>>> result = yd+dinc
>>> result

>>>

but there may well be more efficient ways.

regards
Steve

 

[Eddie Corns]

I have a Julian (?) date string '2000238' (format YYYYDDD) which
corresponds to 2000/08/25

How do I create a correct DateTime object with this?

Logically you could do:
<DateTime object for '2000-08-25 00:00:00.00' at 403ae410>

However that doesn't work on all systems. Works on my Linux systems but not
my BSD ones Depends on the C implementation of strptime which has never
been 100%

Probably better to do:

year,day = ...
mx.DateTime.strptime(year,'%Y') + int(day) - 1

eg:
<DateTime object for '2000-08-25 00:00:00.00' at 4039c138>


which is more portable.

Eddie