[IronPython] Newbie: convert string to python expression??

[xkrja]

Thanks for the reply.

Below is a snippet of what I've got:

def inputBox_KeyDown(s, e):
    root.message.Text = ''
    key = e.Key.value__
    result = root.inputBox.Text
    if key == 3: #If 'Enter' key is pressed
        try:
          root.message.Text = eval(result)
        except:
          exec result
         
root = Application.Current.LoadRootVisual(UserControl(), "app.xaml")
sys.stdout = Writer(root.message)

root.inputBox.KeyDown += inputBox_KeyDown

Can't I just put everthing that is evaluated or executed in some kind of
global scope so that they can be accessed just like in the console? If not:
I looked a little at dictionaries but didn't really understand how to use
them in this case? Can someone give me a short example that can be used for
my case?

Once again, thanks for all help!


Michael Foord-5 wrote:
> 
> You've snipped the code so I can't see it exactly, but I'm pretty sure 
> you are doing this inside a method. This will create a new 'scope' every 
> time you enter the method and so you are creating a local variable that 
> disappears when you exit the method.
> 
> When you exec you can provide a dictionary as a context for the 
> execution to happen in. If you store this as an instance member and 
> re-use the same execution context every time then changes will be 
> 'remembered'.
> 
> Michael
> 

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