How to change label from "any" function or outside from class

[saskoPython]

Hello,

I go thrugh number of tutorials and steel can't find one simple thing (or I can't understand how to do this). My question is this:

if we make "any" function like this:

def myfunc():
#code here:
return

and have a class (gtk or wxWidget) in which we create a Label

class MyLabel():
#code here

#end class
mainloop()

how to change Label inside class MyLabel from myfunc?
I understand how buttons and events work, but i have no idea how to change label, or text from function outside class. ie time triggered timer or any result returned by function which periodicaly change its value?

or is there any way to make label autoupdating? / refreshing?

Tnx for your time and sorry for my english!

[bvdet]

Is this what you mean?

>>> class MyLabel(object):
...     def __init__(self, label="Label 1"):
...         self.label = label
...         
>>> def modify_label(obj, newlabel="This is a new label"):
...     obj.label = newlabel
...     
>>> a = MyLabel()
>>> a.label
'Label 1'
>>> modify_label(a)
>>> a.label
'This is a new label'
>>> 

[saskoPython]

Here is source from tutorial, I made some small changes
In short function wanip gets WAN IP and stores it in variable
Button 3 on click calls it and change text2
I wish to change text2 by simply call that function - wanip or any else
how to do that?

here is the source code
tnx for help

# communicate.py
 
import wx
import urllib
 
global IP
global myip
 
 
 
def wanip():
    global IP
    global myip
    url=urllib.URLopener()
    html=url.open('http://checkip.dyndns.com')
    ans=html.read(160)
    start=ans.find('IP Address')
    end=ans.find('</body>')
    IP = str(ans[start:end])
    return IP
 
 
class LeftPanel(wx.Panel):
    def __init__(self, parent, id):
        wx.Panel.__init__(self, parent, id, style=wx.BORDER_SUNKEN)
        global IP
        self.text1 = parent.GetParent().rightPanel.text1
        self.text2 = parent.GetParent().rightPanel.text2
 
        button1 = wx.Button(self, -1, '+', (10, 10))
        button2 = wx.Button(self, -1, '-', (10, 35))
        button3 = wx.Button(self, -1, 'Check WAN IP', (10,60))
 
        self.Bind(wx.EVT_BUTTON, self.OnPlus, id=button1.GetId())
        self.Bind(wx.EVT_BUTTON, self.OnMinus, id=button2.GetId())
        self.Bind(wx.EVT_BUTTON, self.CheckIP, id=button3.GetId())
 
    def OnPlus(self, event):
        value = int(self.text1.GetLabel())
        value = value + 1
        self.text1.SetLabel(str(value))
 
    def OnMinus(self, event):
        value = int(self.text1.GetLabel())
        value = value - 1
        self.text1.SetLabel(str(value))
 
    def CheckIP(self,event):
        global IP
        #value = str(self.text.GetLabel())
        #here i call function to check IP and set label
        self.text2.SetLabel(str(wanip())) #place IP instead of function
 
class RightPanel(wx.Panel):
    def __init__(self, parent, id):
        wx.Panel.__init__(self, parent, id, style=wx.BORDER_SUNKEN)
        self.text1 = wx.StaticText(self, -1, '0', (5, 10))
        self.text2 = wx.StaticText(self, -1, 'checking IP', (5,25))
 
class Communicate(wx.Frame):
    def __init__(self, parent, id, title):
        wx.Frame.__init__(self, parent, id, title, size=(400, 200))
 
        panel = wx.Panel(self, -1)
        self.rightPanel = RightPanel(panel, -1)
 
        leftPanel = LeftPanel(panel, -1)
 
        hbox = wx.BoxSizer()
        hbox.Add(leftPanel, 1, wx.EXPAND | wx.ALL, 5)
        hbox.Add(self.rightPanel, 1, wx.EXPAND | wx.ALL, 5)
 
        panel.SetSizer(hbox)
        self.Centre()
        self.Show(True)
 
app = wx.App()
Communicate(None, -1, 'widgets communicate')
 
#here is (I think) reference to object in class LeftPanel, text2
 
#here i call my func
wanip() #args
 
app.MainLoop()
 

[bvdet]

Eliminate the global statements - you don't need them. It's not good practice to use global variables anyway. Pass the object you want to modify to your function, and use method SetLabel() in the function.

# communicate.py
 
import wx
import urllib
 
def wanip(obj):
    url=urllib.URLopener()
    html=url.open('http://checkip.dyndns.com')
    ans=html.read(160)
    start=ans.find('IP Address')
    end=ans.find('</body>')
    IP = str(ans[start:end])
    obj.SetLabel(IP)
    return IP
 
class LeftPanel(wx.Panel):
    def __init__(self, parent, id):
        wx.Panel.__init__(self, parent, id, style=wx.BORDER_SUNKEN)
        self.text1 = parent.GetParent().rightPanel.text1
        self.text2 = parent.GetParent().rightPanel.text2
 
        button1 = wx.Button(self, -1, '+', (10, 10))
        button2 = wx.Button(self, -1, '-', (10, 35))
        button3 = wx.Button(self, -1, 'Check WAN IP', (10,60))
        self.button3 = button3
        self.Bind(wx.EVT_BUTTON, self.OnPlus, id=button1.GetId())
        self.Bind(wx.EVT_BUTTON, self.OnMinus, id=button2.GetId())
        self.Bind(wx.EVT_BUTTON, self.CheckIP, id=button3.GetId())
 
    def OnPlus(self, event):
        value = int(self.text1.GetLabel())
        value += 1
        self.text1.SetLabel(str(value))
 
    def OnMinus(self, event):
        value = int(self.text1.GetLabel())
        value -= 1
        self.text1.SetLabel(str(value))
 
    def CheckIP(self,event):
        wanip(self.text2)
 
class RightPanel(wx.Panel):
    def __init__(self, parent, id):
        wx.Panel.__init__(self, parent, id, style=wx.BORDER_SUNKEN)
        self.text1 = wx.StaticText(self, -1, '0', (5, 10))
        self.text2 = wx.StaticText(self, -1, 'checking IP', (5,25))
 
class Communicate(wx.Frame):
    def __init__(self, parent, id, title):
        self.app = wx.App()
        wx.Frame.__init__(self, parent, id, title, size=(400, 200))
        panel = wx.Panel(self, -1)
        self.rightPanel = RightPanel(panel, -1)
 
        leftPanel = LeftPanel(panel, -1)
        self.leftPanel = leftPanel
        hbox = wx.BoxSizer()
        hbox.Add(leftPanel, 1, wx.EXPAND | wx.ALL, 5)
        hbox.Add(self.rightPanel, 1, wx.EXPAND | wx.ALL, 5)
 
        panel.SetSizer(hbox)
        self.Centre()
        self.Show(True)
 
if __name__ == '__main__':
    a = Communicate(None, -1, 'widgets communicate')
    a.app.MainLoop()