Thanks for all the explanations, everyone. This does make sense, and I am now using the if(arg==None): arg=self.arg idea. It only adds a couple lines, and is, if anything, more explicit than what I was doing before.
On 5/27/10, Mark Lawrence <breamore...@yahoo.co.uk> wrote: > On 23/05/2010 20:40, Alex Hall wrote: >> Hello all, >> I know Python reasonably well, but I still run into basic questions >> which those over on the other python list request I post here instead. >> I figure this would be one of them: >> Why would this not work: >> >> class c(object): >> def __init__(self, arg1, arg2): >> self.arg1=arg1 >> self.arg2=arg2 >> >> def doSomething(self, arg3=self.arg1): >> ... >> >> The above results in an error that "name 'self' is not defined". Why >> can I not set the default values of a method's arguments to class vars >> like that? Thanks! >> >> > You've already had some explanations as to what happens, but what are > you trying to achieve? Why don't you forget about arg3 because it is > arg1, which must exist by creating an instance of class c, or you > wouldn't be able to call doSomething in the first place? > > HTH. > > Mark Lawrence > > > _______________________________________________ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > http://mail.python.org/mailman/listinfo/tutor > -- Have a great day, Alex (msg sent from GMail website) mehg...@gmail.com; http://www.facebook.com/mehgcap _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
