Paulo da Silva a écrit : > Bruno Desthuilliers escreveu: >> Paulo da Silva a écrit : > ... > >>> class MyDate(date): >>> def __new__(cls,year,month=None,day=None): >>> if type(year) is str: >> And what if it's a unicode string ? >> The correct idiom here is: >> if isinstance(year, basestring): >> > > > Thanks. > If I do type(year) I get either int or str (may be unicode for unicode > strings) but never anything like basestring.
It's an abstract class. > As a relatively inexperient > in python, how could I know that a 'string' is an instance of > basestring? By reading this newsgroup ?-) > x=u"xxxxxx"; help(x) says this is unicode based on > basestring but help does not "work" for x="xxxxxxxx". help(str) > May be the python tutorial should be upgraded to include these new > concepts. Also covering the basics of __init__/__new__ (why have both?) It's a long story. But it's a GoodThing(tm) IMVHO. -- http://mail.python.org/mailman/listinfo/python-list
