Python rocks

[Hendrik van Rooyen]

 "Mark Carter" <me at pr...net> wrote:


> Josiah Carlson wrote:

> >  What kind of scoping did you desire?
>
> Well, I had in mind so that if you defined a function, but wanted to
> access a global var, that you didn't have to use the global keyword. Not
> much of a biggie, I guess.

You can access them without the global keyword - for "reading" .

You only need global if you are assigning to it - else you get a new function
local:

>>> x = 7
>>> def rubbish():
            print x

>>> rubbish()
7
>>> def more_rubbish():
            x = x+1
            print x

>>> more_rubbish()
Traceback (most recent call last):
  File "<pyshell#10>", line 1, in ?
    more_rubbish()
  File "<pyshell#9>", line 2, in more_rubbish
    x = x+1
UnboundLocalError: local variable 'x' referenced before assignment

>>>def other_rubbish():
            y = x+1
            print y

>>> other_rubbish()
8
>>> x
7
>>> def global_rubbish():
            global x
            x = x + 1
            print x

>>> global_rubbish()
8
>>> print x
8
>>>

- Hendrik