Best way to share a python list of objects

[kyle.tk]

So I have a central list of python objects that I want to be able to
share between different process that are possibly on different
computers on the network. Some of the processes will add objects to
list and another process will be a GUI that will view objects in the
list. I want this all to happen in real-time (e.g once a processes adds
an object to the list the GUI will see it.)

What would be the best way to accomplish this. Some of my ideas:
- An XML file r/w-able by all processes
- Send pickled objects between all processes and each keeps it own list
locally
- A ascii type protocol akin to ftp the hands out all the info to the
processes

Any other ideas? What would work the best

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putting a string in Mac Address form

[kyle.tk]

I came up with this. Is there a better (more pythonic) way to do it?

import string
def mac_to_norm(mac):
def bad_char(char):
if char not in string.hexdigits:
return False
return True
mac = filter(bad_char,mac)
if len(mac) is not 12: return None
new_mac = ''
c = 0
while len(new_mac) < 16:
new_mac += mac[c:c+2] + ':'
c=c+2
return new_mac[:-1].upper()
print mac_to_norm('0012.ab23.b2cd')
#shows: 00:12:AB:23:B2:CD

The part I think is bad is the while loop part. Could it be better?

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Re: Newbie Question

[kyle.tk]

solaris_1234 wrote:
> I am trying to learn Python and I have a few questions.
>
> I have created a Class that is essentially a canvas with a red
> background. After creation I want to change the background to green.
> However I am having problems doing this.
>
> Here is my code:
>
> from Tkinter import *
>
> class MyApp:
>def __init__(self, parent):
>   self.myParent = parent
>   self.myContainer = Frame(parent)
>   self.myContainer.pack()
>
>   self.b1 = Canvas(self.myContainer, background="red").grid(row=0,
> column=0)
>
> def ChangebgColor(self):
>self(bg="green")
>
>
> root = Tk()
> myapp=MyApp(root) #Everything is fine at this point.
>
> raw_input()
>
> ChangebgColor(myapp.b1) # Error Message at this point
>
> raw_input()
>
>
>
> Any help will be greatly appreciated.

here ya go.

from Tkinter import *

class MyApp:
def __init__(self, parent):
self.myParent = parent
self.myContainer = Frame(parent)
self.myContainer.pack()
self.b1 = Canvas(self.myContainer, background="red")
self.b1.grid(row=0,column=0)

def ChangebgColor(self):
self.b1.config(bg="green")

root = Tk()
myapp=MyApp(root)
raw_input()
myapp.ChangebgColor()
raw_input()

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Re: Python riddle

[kyle.tk]

SPE - Stani's Python Editor wrote:
> I know that this code is nonsense, but why does this print 'Why?'
>
> a = 1
> if a >2:
> try:
> 5/0
> except:
> raise
> else:
> print 'why?'

last time i checked this should print 'why?'
I have no idea how you got it to print 'Why?'

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network mapper Gui question

[kyle.tk]

I am trying to make a program much like cheops that will make a
graphical representation of my network. What would be the best language
to make the actuall interface in, Tkinter, wxPython, PyGtk? And in
those what module would work for something like this. It needs to be
able to redraw it self about every half minute or so without being to
heavy on the processor. Any ideas?

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dynamicly updating an objects fields

[kyle.tk]

I want to make a function that will work like this:

def updateField(object, fieldName, newValue):
object.fieldName = newValue

fieldName could be anything, the list of objects fields will grow as my
project goes on and i want to reuse the same code without adding more
if statements to it

this is the only way I can see doing it right now:

def updateField(object, fieldName, newValue):
if fieldName = 'name':
nodeDict[nodeID].name = newValue
if fieldName = 'color':
nodeDict[nodeID].color = newValue
..many more if's..

is the top example possible?

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Re: Hiding Console Output

[kyle.tk]

Kkaa wrote:
> I'm using the os.system command in a python script on Windows to run a
> batch file like this:
>
> os.system('x.exe')
>
> The third-party program x.exe outputs some text to the console that I
> want to prevent from being displayed.  Is there a way to prevent the
> output of x.exe from python?

Use os.popen('x.exe') instead. 

-kyle

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