using 'global' across source files.

[Bram Stolk]

Hello,


Using the 'global' keyword, I can have my functions
access global variables, like:

  # try.py
  val=100

  def change_val() :
    global val
    val = 2*val

  change_val()
  print val

However, this scheme falls apart if I split up this
code in two files, one containing the global, and
one containing the func.

  # prog.py

  from funcs import *

  val = 100

  change_val()
  print val

  # funcs.py

  def change_val() :
    global val
    val = val * 2

When running I get an error:

bram at gazoo> python -i prog.py
Traceback (most recent call last):
  File "prog.py", line 7, in ?
    change_val()
  File "funcs.py", line 5, in change_val
    val = val * 2
NameError: There is no variable named 'val'


Why?
And how can I fix this?
I've tried stuff like __main__.val, but
that is not accepted by python.

thx,
 
   Bram Stolk


-- 
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 Bram Stolk, VR Specialist.
 SARA Academic Computing Services Amsterdam, PO Box 94613, 1090 GP  AMSTERDAM
 email: bram at sara.nl   Phone +31-20-5923059  Fax +31-20-6683167

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