John Steedman wrote: > Hi Tutors, > > I'm confused by the following possible contradiction. Would someone please > explain or point me to the right docs. > > FACT 1 > > "Variables in python hold references to objects." > http://en.wikipedia.org/wiki/Python_syntax_and_semantics > > FACT 2 > >>>>def Increment ( x ) : >>>> // return x + 1 >>>> x = x + 1 >>>> return x >>>> >>>>y = 1 >>>>z = Increment ( y ) >>>>y > 1 >>>>z > 2 > > By FACT 1 x should be a reference parameter...? > By Fact 2 x would seem to be a copy...? > > What in the world of dynamic typing is going on?
There's a big confusion in terminology. Does http://en.wikipedia.org/wiki/Evaluation_strategy#Call_by_sharing help? Here's a more detailed explanation: <http://learntofish.wordpress.com/2012/01/09/call-by-object-reference-call-by-sharing/> _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
