Is it true that a datetime object can convert itself into a string, but not the other way around? IOW, there's no simple way to take the output from str(d) and turn it back into d?
I assume this is true because there is not one standard format for a date-time string. But I don't use the module enough, so I'll let someone else answer this part of the question.
import datetime
class MyDatetime(datetime.datetime): def __init__(self,s): s1,s2 = s.split(' ') v = s1.split('-') + s2.split(':') v = map(int,v) datetime.datetime.__init__(self,v[0],v[1],v[2],v[3],v[4],v[5])
s = '2005-02-14 12:34:56' d = MyDatetime(s)
Running the above yields:
Traceback (most recent call last): File "dt.py", line 11, in ? d = MyDatetime(s) TypeError: function takes at least 3 arguments (1 given)
datetime.datetime objects are immutable, so you need to define __new__ instead of __init__:
py> class DateTime(datetime.datetime):
... def __new__(cls, s):
... s1, s2 = s.split(' ')
... v = map(int, s1.split('-') + s2.split(':'))
... return datetime.datetime.__new__(cls, *v)
...
py> DateTime('2005-02-14 12:34:56')
DateTime(2005, 2, 14, 12, 34, 56)Steve -- http://mail.python.org/mailman/listinfo/python-list
