[IronPython] [python] [IronPythonStudio] Namespace Classes andAssembly Files
Pigneri, Rocco
rpigneri at LavaStorm.com
Wed Jan 30 19:30:33 CET 2008
They both declare the same namespace class (this is setup via IPS
itself) that then has FormOne and FormTwo inside of them. I was
assuming that they behaved much like C# namespaces (as per my first
e-mail).
Thank you,
Rocco
-----Original Message-----
From: users-bounces at lists.ironpython.com
[mailto:users-bounces at lists.ironpython.com] On Behalf Of Steve Holden
Sent: Wednesday, January 30, 2008 12:57 PM
To: Discussion of IronPython
Subject: Re: [IronPython] [python] [IronPythonStudio] Namespace Classes
andAssembly Files
Is it by chance possible that both modules define the same names?
If so, there's clearly no way to import * from both modules. In which
case the solution is to write
import FormOne
import FormTwo
and then use form-relative names like FormOne.this and FormTwo.that -
that will avoid naming conflicts between the two modules.
regards
Steve
Pigneri, Rocco wrote:
> Ah, ha! I think I may have found the culprit!
>
> If I have the following import sequences in the follwing order, then
> only FormTwo is available:
>
> from FormOne import *
> from FormTwo import *
>
> However, if they are in this order, then only FormOne is available:
>
> from FormTwo import *
> from FormOne import *
>
> It seems that only the last class statement that is evaluated/imported
> is retained.
>
> Since I'm new to [Iron]+Python[Studio]+, I am unsure if this is
> correct behavior that I have to be aware of or not. Anyone else have
> any insight?
>
> Thank you,
>
> Rocco
>
> -----Original Message-----
> From: users-bounces at lists.ironpython.com
> [mailto:users-bounces at lists.ironpython.com] On Behalf Of Pigneri,
> Rocco
> Sent: Wednesday, January 30, 2008 11:51 AM
> To: Discussion of IronPython
> Subject: Re: [IronPython] [python] [IronPythonStudio] Namespace
> Classes andAssembly Files
>
> Here's the output from the project where FormTwo works:
>
> ['FormTwo', '__doc__', '__module__']
>
> Here's the output from the project where FormOne works:
>
> ['FormOne', '__doc__', '__module__']
>
> Really, this is quite fascinating. There's no mention of the class
> that was not run on the first time. What's even more fascinating is
> that the code files are identical, including the namespace classes
> (excluding, of course, the class names and a few spaces after
comments).
>
> Rocco
>
> -----Original Message-----
> From: users-bounces at lists.ironpython.com
> [mailto:users-bounces at lists.ironpython.com] On Behalf Of Michael Foord
> Sent: Tuesday, January 29, 2008 7:03 PM
> To: Discussion of IronPython
> Subject: Re: [IronPython] [python] [IronPythonStudio] Namespace
> Classes and Assembly Files
>
> Pigneri, Rocco wrote:
>> 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.
>>
>>
>
> Wow that sounds like a tangled mess - but this is only Python after
> all, so it should be following deterministic rules (I assume you are
> running source code or are you running a compiled executable?).
>
> How about throwing a 'print dir(Forms)' in their so you can see if
> your form classes really exist.
>
> Michael
> http://www.manning.com/foord
>
>> 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
>>> --------------------------------------------------------------------
>>> -
>>> -
>>> --
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at lists.ironpython.com
>>> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
>>>
>>>
>> _______________________________________________
>> Users mailing list
>> Users at lists.ironpython.com
>> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
>>
>> _______________________________________________
>> Users mailing list
>> Users at lists.ironpython.com
>> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
>>
>>
>>
>
> _______________________________________________
> Users mailing list
> Users at lists.ironpython.com
> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
>
> _______________________________________________
> Users mailing list
> Users at lists.ironpython.com
> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
>
> _______________________________________________
> Users mailing list
> Users at lists.ironpython.com
> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
>
--
Steve Holden +1 571 484 6266 +1 800 494 3119
Holden Web LLC http://www.holdenweb.com/
_______________________________________________
Users mailing list
Users at lists.ironpython.com
http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
More information about the Ironpython-users
mailing list