explicit variable scoping

[Sean Ross]

"Eyal Lotem" <gnupeaker at yahoo.com> wrote in message
news:mailman.279.1080051991.742.python-list at python.org...

> Explicit "let"s do seem to get rid of the
> local-vs-global issue, while providing an elegant
> solution to the nested-functions variable access
> problems.
>
> d=1
> e=9
> def f():
>   def a=None,b=3 # Since locals are typically
>                  # created via an assignment
>                  # it makes much sense to allow
>                  # unifying the creation of their
>                  # scope [def] with the assignment
>                  # to eliminate some redundancy
>   b=4 # rebinding
>   d=5 # raise error, neither local or global
>   global e
>   def g():
>     e=10 # global assignment
>     b=5 # rebinding
>     def a=7 # new local binding
>   print a, b, e # will print None, 5, 10

Hi.

Re-using "def" like that really is confusing. Maybe try "let":

let d = 1
let e = 9
def f():
    let a, b = None, 3
    b = 4 # rebind
    d = 5 # raise error, should be "let d = 5"
   def g():
       e = 10  # global assignment
       b = 5  # rebind b in f
       let a = 7  # new local binding
    print a, b, e  # will print None 5 10



Or, perhaps ":=" :

d := 1
e := 9
def f():
    a, b := None, 3
    b = 4 # rebind
    d = 5 # raise error, should be "d := 5"
   def g():
       e = 10  # global assignment
       b = 5  # rebind b in f
       a := 7  # new local binding
    print a, b, e  # will print None 5 10