Global Variables

[Bob Then]

If I have a module File
which has some fucontions but I need globals filename and path how can I
set them so I can change them because I tryed.

filename="log.t xt"
path="/home/Bob/"

def change_filename ():
filename=raw_in put()

def change_path():
path=raw_input( )

they don't change and without the declarations there not global.

Help Please

[George Sakkis]

Re: Global Variables

Use 'global':

def change_filename ():
global filename
filename=raw_in put()


def change_path():
global path
path=raw_input( )


Even better, don't use globals at all; in 99% if the time, there are
better ways to achieve the same effect.

George

[Tim Roberts]

Re: Global Variables

"Bob Then" <Bob_then@yahoo .com.au> wrote:
[color=blue]
>If I have a module File
>which has some fucontions but I need globals filename and path how can I
>set them so I can change them because I tryed.
>
>filename="log. txt"
>path="/home/Bob/"
>
>def change_filename ():[/color]
global filename[color=blue]
> filename=raw_in put()
>
>def change_path():[/color]
global path[color=blue]
> path=raw_input( )
>
>they don't change and without the declarations there not global.[/color]

However, the reason that must be stated explicitly is because it's a bad
practice. It means that your function has "side effects" beyond just
returning a value or set of values. This kind of thing is a better
solution:

def change_filename ():
return raw_input()

def change_path()
return raw_input()

filename = change_filename ()
path = change_path()
--
- Tim Roberts, timr@probo.com
Providenza & Boekelheide, Inc.