I had shown how datetime can be used in python 2.2
in a previous snippet. Still, it's sometimes too big.

Here's a minimal implementation. It works like both
datetime and stuct_time (as returned by localtime() and gmtime()).

   1  
   2  import time
   3  
   4  class datetime(object):
   5      def __init__(self, *argv):
   6          self.t = time.struct_time(argv+(0,)*(9-len(argv)))    # append to length 9 
   7      def __getattr__(self, name):
   8          try:
   9              i = ['year', 'month', 'day', 'hour', 'minute', 'second', 'weekday'].index(name)
  10              return self.t[i]
  11          except:
  12              return getattr(self.t, name)
  13      def __len__(self): return len(self.t)
  14      def __getitem__(self, key): return self.t[key]
  15      def __repr__(self): return repr(self.t)
  16      def now(self=None):
  17          return datetime(*time.localtime())
  18      now = staticmethod(now)
  19      def strftime(self, fmt="%Y-%m-%d %H:%M:%S"):
  20          return time.strftime(fmt, self.t)

Here's its usage

   1  
   2  # here it works like datetime.datetime()
   3  >>> t = datetime.now()
   4  >>> t.year, t.month, t.day
   5  (2006, 3, 13)
   6  >>> t.hour, t.minute, t.second
   7  (23, 3, 28)
   8  
   9  # but also works like localtime()
  10  >>> t
  11  (2006, 3, 13, 23, 3, 28, 0, 72, -1)
  12  >>> t.tm_year, t[0]
  13  (2006, 2006)
  14  >>> mktime(t)
  15  1142265808.0
  16  
  17  # good default for strftime (= ctime)
  18  >>> t.strftime()
  19  '2006-03-13 23:03:28'

Python 2.2 doesn't have a decend date/time class.
There's a small compatible library from the Python Web Project.

I download the source and extract the datetime.py then
send it to my phone as a pys60 library.
Here's a simple test that works well.
(Taken from Effbot)

   1  
   2  >>> import datetime
   3  >>> now = datetime.datetime(2003, 8, 4, 12, 30, 45)
   4  >>> print now
   5  2003-08-04 12:30:45
   6  >>> print repr(now)
   7  datetime.datetime(2003,8,4,12,30,45)
   8  >>> print type(now)
   9  <type 'instance'>
  10  >>> print now.year, now.month, now.day
  11  2003 8 4
  12  >>> print now.hour, now.minute, now.second
  13  12 30 45

See its documentation here.
One limitation as a library is that you need to use

   1  datetime.datetime(2004,1,1).now() # work for any version

instead of just

   1  datetime.datetime.now() # python 2.3+

update
======
I add 'staticmethod' expression. Now it works fine.

   1  
   2      def now(self=None):
   3          "Return the current date and time as a datetime."
   4          now = t.localtime()
   5          return datetime(now[0],now[1],now[2],now[3],now[4],now[5])
   6      now = staticmethod(now)