Mailman 3 March 2005 - Python.NET

Python bridge for .NET CF
by Boris Capitanu 21 Mar '05

21 Mar '05

Hello again, I am also interested if there is a way to get the bridge to work with Python for Pocket PCs. There is a Python 2.2 available for Pocket PCs from http://www.murkworks.com/Research/Python/PocketPCPython/Overview Thank you, Boris Capitanu capitanu(a)uiuc.edu __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

2 1

bug in managed object usage handling within a module.
by Stan Pinte 21 Mar '05

21 Mar '05

hello, I will try to describe my problem in an abstract way... I have the following C# objects: namespace Foo { abstract class A class B : A } namespace Bar { class C { static object createInstance(A argument) { ... } } } when I do the following in a module located below the current directory (example: functional/testfoobar.py) , it gives me an error: import sys sys.path.append('bin') rom CLR.System.Reflection import Assembly Assembly.LoadWithPartialName("foobar") from CLR.Bar import C from CLR.Foo import A,B x = B() assert isinstance(x, A) h = C.createInstance(x) --> TypeError: no method matches given arguments while if I do it in a module located in the current directory (the top level of the sources), it works all right. What is strange is that assert isinstance(x, A) works all right in both cases, it just fails on the last line...and it properly recognize static method of class C... If really needed, I can try to engineer a compilable test case... it is some work though... let me know, thanks, Stan.

1 0

PythonEngine.UnloadModule?
by Boris Capitanu 19 Mar '05

19 Mar '05

Hello, Is there any way to un-import a module? Suppose I create a plug-in scenario and load plugins with ImportModule... at some point I want to unload a plugin, so something like PythonEngine.UnloadModule is needed. Is this possible to do? Thank you! Boris Capitanu capitanu(a)uiuc.edu __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

1 0

AcquireThreadLock - bug? future?
by Roman Yakovenko 14 Mar '05

14 Mar '05

Hi. I have small problem with multithreading and need help to solve it. I have dll written in managed C++. Within dll I have class that has static function. I'd like to call this function from a few threads from python. I failed to do this. Calling function staled and this is a stack dump from debugger ( of my program ) python.runtime.dll!Python.Runtime.PythonEngine.AcquireThreadLock() + 0x40 bytes python.runtime.dll!Python.Runtime.MethodBinder.Invoke(int inst = 11793552, int args = 9900080, int kw = 0) + 0xf0 bytes python.runtime.dll!Python.Runtime.MethodObject.Invoke(int target = 11793552, int args = 9900080, int kw = 0) + 0x25 bytes python.runtime.dll!Python.Runtime.MethodBinding.tp_call(int ob = 11794928, int args = 9900080, int kw = 0) + 0x137 bytes I don't understand: 1. Why Python.Net tries to acquire thread lock, while calling function ? I am possible to call get property from a few threads. From managed C++ point of view ( I could be wrong here ) getting value of property it is just syntax sugaring for get_??? call. I want to say that if I able to call "get property" from a few threads I should be able to call function from a few threads. 2. Why at all Python.Net tries to synchronize function calls? I can modify and compile source code of Python.Net, but I know to little about reasons of calling AcquireThreadLock. Thanks for help Roman

3 3

Importing a Managed .Net C++ DLL
by alan haffner 10 Mar '05

10 Mar '05

Hello, Is it possible to import a Managed .Net C++ DLL file? I seem to be able to import C# DLLs and the namespace of a C++ DLL, but not its Public Class. Thanks -Alan Haffner

3 2

Bug with System.Diagnostics.Process.ProcessName and tcl
by Steffen Guhlemann 09 Mar '05

09 Mar '05

Hi, I experienced some very strange bugs. Can someone help me? The affected Programm is mainly written in Python with a Tcl-Gui. Some part of the application logic lies in a c#-dll. Deep in this dll a function searches for a certain Process by its id: Process p=Process.GetProcessById(pid); Afterwards the function checks the name of this Process: string name=p.ProcessName; This line makes Python go crazy. At least the Tcl-Gui and the float-Arithmetics (i don't know which is a consequece of which) - we don't know what else is affected. The Tcl-Windows appear with minimal size (0,0) instead of the size they where meant to. Others with certain controls (e.g. a tree-Control) don't even appear. Instead Python throws the following Exception: Traceback (most recent call last): File "C:\tmp\testProcesses\bin\Release\test.py", line 577, in ? width=300) File "C:\tmp\testProcesses\bin\Release\test.py", line 388, in __init__ self.move_cursor(self.root) File "C:\tmp\testProcesses\bin\Release\test.py", line 474, in move_cursor self.see(node.symbol, node.label) File "C:\tmp\testProcesses\bin\Release\test.py", line 446, in see while x2 > self.canvasx(0)+self.winfo_width(): File "C:\Python23\lib\lib-tk\Tkinter.py", line 2028, in canvasx return getdouble(self.tk.call( ValueError: invalid literal for float(): 6.0 The float arithmetic error, we found is not deterministic...if i edit and start the script in IDLE, which also starts the Tree-Control mentioned above, then somewhen it starts to go wrong with these lines: val1=0.95 val2=1024 val3=int(val1*val2) print val3 If beforehand of these lines no c#-function is called that uses some ProcessName, the result is 972, otherwise the result could be 0. This is not deterministic, the Tcl-Problem is deterministic. Thanks Steffen

2 1

Using PythonNet to import a .Net compiled C++ dll
by Alan Haffner 04 Mar '05

04 Mar '05

Hello, Is it possible to import a Managed .Net C++ DLL file? I seem to be able to import C# DLLs and the namespace of a C++ DLL, but not its Public Class. Thanks -Alan Haffner

1 0

Python.NET March 2005