Newbie questions part 2, thanks

[Paul Rubin]

"David Grenier" <grenieda at hotmail.com> writes:

> Thanks, it worked...
> 
> Now here:
> 
> Whenever I call cons.mappe(lambda x:2*x, cons(1,[]))

When you call cons.mappe(x,y), the method actually gets called
with 3 args.  The first is bound to cons itself.  Normally 
you define a method like this:
  def methodname(self, arg1, arg2): ...

Also you can rewrite

>       if type(schemelist.cdr) is InstanceType and schemelist.cdr.__class__==cons:

as
       if isinstance(schemelist.cdr, cons): 

Please try reading through the Python language reference to understand
this stuff.