Senthil Kumaran writes: > On Sun, Nov 9, 2014 at 1:14 AM, Noufal Ibrahim KV <nou...@nibrahim.net.in> > wrote: > >> How is lexical scoping with a mutable environment different from dynamic >> scoping? >> > > I think you should post this in python-dev and you might get answers with > rigorous definitions. > > Here is my short snippet which shows a behavior which does not indicate a > dynamic binding nature. > > > # example.py > x = 10 > y = lambda: x > > def f(): > x = 20 # This is not rebinding. It is creating a new local variable by > name x > # But we are referring to x in y function call, so for the > definition of dynamic binding (?) > # should y() see x defined in the local scope instead of the > previously assigned value. > print(y()) > return y() > > x = 30 # This is rebinding in the same scope. > print(f()) > > $ python example.py > 30 > 30
Just for understanding, trying the same snippet in emacs lisp which has dynamic binding will reveal the value of `x' as 20, as expected in dynamic binding as we change the value of x inside the function. (setq x 10) (defun y () x) (defun f () (setq x 20) (print (y)) (y)) (print (f)) ; 20 20 -- Abhishek _______________________________________________ BangPypers mailing list BangPypers@python.org https://mail.python.org/mailman/listinfo/bangpypers
