[IronPython] [python] [IronPythonStudio] Namespace Classes and Assembly Files

[Pigneri, Rocco]

Dear Michael,

Well, I tried this out this morning, and I noticed that the plot has
thickened.  However, let me answer your question first:

>> I next add a new Form to the project by right-clicking on the project

>> name in the Solution Explorer, and go to Add->New Item->Windows Form.
>> I call this class FormTwo.  FormTwo is now placed in the Forms 
>> namespace as well.
>>  
>> If I try to use the FormTwo class in the Program.py file (i.e. I
would 
>> rather start up with FormTwo rather than FormOne), Forms.FormTwo() 
>> does not do the trick.  The debugger keeps reporting that the class
is 
>> not found.  This also happens if I add "from FormTwo import *" to the

>> top of the file.
>>  
>> What am I doing wrong here?  I feel like I should be able to
reference 
>> any class in an assembly/project from any class in the same 
>> assembly/project.  I have been able to get this to work by changing 
>> the namespace class in FormTwo.py, but I feel like that is the wrong 
>> approach.
>
>Can you post the actual error you get? The import and reference you
posted should work, so the exact error will tell us what is going wrong.

Here is the error message.  This is an exception that is thrown at
run-time.

Title: MissingMemberException was unhandled by user code.
Description: type object 'Forms' has no attribute 'FormTwo'

Now, here's where the plot thickens: if I create the solution, change
the Program.py file to use FormTwo and then run the project *for the
first time*, it runs fine.  However, when I change the project to
FormOne and try to run it, it throws that exception.  The same happens
in the opposite direction: if I run the program first with FormOne, then
it fails when I try it with FormTwo.  In other words, whichever Form the
Program.py file uses in its first run is the only one that it can use.
After that, it cannot find any other Form class.

Thank you,

Rocco

-----Original Message-----
From: users-bounces at lists.ironpython.com
[mailto:users-bounces at lists.ironpython.com] On Behalf Of Michael Foord
Sent: Saturday, January 26, 2008 12:20 PM
To: Discussion of IronPython
Subject: Re: [IronPython] [python] [IronPythonStudio] Namespace Classes
and Assembly Files

Pigneri, Rocco wrote:
> Dear all,
>  
> I am new to Python, IronPython, and IronPythonStudio, but so far I am 
> enjoying the functionality that IPS offers me.
>  
> One thing that confuses me, however, is the namespace classes that IPS

> creates for me.  Let's say I create a Windows Forms project called 
> Forms with a default form called FormOne.  FormOne is created in the 
> Forms namespace while the Program.py file is placed in the Forms0 
> namespace.

This is annoying (unpythonic) but is probably due to the way the CodeDom
works - it basically creates the equivalent IronPython to the C# it
would generate.

>  
> I next add a new Form to the project by right-clicking on the project 
> name in the Solution Explorer, and go to Add->New Item->Windows Form.
> I call this class FormTwo.  FormTwo is now placed in the Forms 
> namespace as well.
>  
> If I try to use the FormTwo class in the Program.py file (i.e. I would

> rather start up with FormTwo rather than FormOne), Forms.FormTwo() 
> does not do the trick.  The debugger keeps reporting that the class is

> not found.  This also happens if I add "from FormTwo import *" to the 
> top of the file.
>  
> What am I doing wrong here?  I feel like I should be able to reference

> any class in an assembly/project from any class in the same 
> assembly/project.  I have been able to get this to work by changing 
> the namespace class in FormTwo.py, but I feel like that is the wrong 
> approach.

Can you post the actual error you get? The import and reference you
posted should work, so the exact error will tell us what is going wrong.

Michael Foord
http://www.manning.com/foord

>  
> Thank you,
>  
> Rocco
> ----------------------------------------------------------------------
> --
>
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