[Tutor] AttributeError in class Today

[Thomas Rivas]

Hi all -- Newbie question here:

When I rum Listing 10.7 from 'Teach Yourself Python in 24 Hours:'

#!/usr/local/bin/python
import time
import now
class today(now.now):
    def __init__(self, y = 1970):
        now.now.__init__(self)
    def update(self,tt):
        if len(tt) < 9:
            raise TypeError
        if tt[0] < 1970 or tt[0] > 2038:
            raise OverflowError
        self.t = time.mktime(tt)
        self(self.t)
if __name__ == "__main__":
    n = today()
    print "The year is", n.year
    print n
    x = today()
    s = `x`
    print s
    tt = (1999, 7, 16, 12, 59, 59, 0, 0, -1)
    x.update(tt)
    print x

I get the following result with an AttributeError:

The year is 2002
<__main__.today instance at 0x83f891c>
<__main__.today instance at 0x83f891c>
Traceback (most recent call last):
    File".../py_snips/today, line 22  in ?
      x.update(tt)
    File".../py_snips/today, line 13, in update
      self(self.t)
AttributeError: today instance has no __call__ method

My question is: What arguments should this __call__ method have?; where 
should I put it the update() function? Is the problem with the 'now' module 
that was created and imported? In short, what's happening here?

Thank for the help.