Subclassing: what is wrong here?

[Paulo da Silva]

Miki escreveu:
> Hello Paulo,
> 
>> What's wrong with this way of subclassing?
>> ...
> See  http://sourceforge.net/tracker/index.php?func=detail&aid=1448640&group_id=5470&atid=105470
> 
> HTH,
> --
> Miki <miki.tebeka at gmail.com>
> http://pythonwise.blogspot.com
> 

Thanks!
It works this way:

class MyDate(date):
	def __new__(cls,year,month=None,day=None):
		if type(year) is str:
			# The whole date is here as a string
			year,month,day=map(int,string.split(year,'-'))
		if year<100:
			year+=2000
		return date.__new__(cls,year,month,day)