Mailman 3 October 2008 - Python.NET

Re: [Python.NET] Looking for a generic XMLrequest and data extractionscript
by Maksim Kozyarchuk 31 Oct '08

31 Oct '08

David, This is the wrong mailing list for this question. Try posting in on stackoverflow.com ----- Original Message ----- From: pythondotnet-bounces+mkozyarchuk=funddevelopmentservices.com(a)python.org <pythondotnet-bounces+mkozyarchuk=funddevelopmentservices.com(a)python.org> To: pythondotnet(a)python.org <pythondotnet(a)python.org> Sent: Fri Oct 31 07:44:21 2008 Subject: [Python.NET] Looking for a generic XMLrequest and data extractionscript Hello, I am also looking for a Python script to do the following: Send an http request to a remote geodata server and read the data into our existing Python geoprocessing scripts. Is there a generic script available so that I can customise it for the project in hand? Sincerely, David

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Looking for a generic XMLrequest and data extraction script
by David Shi 31 Oct '08

31 Oct '08

Hello, I am also looking for a Python script to do the following: Send an http request to a remote geodata server and read the data into our existing Python geoprocessing scripts. Is there a generic script available so that I can customise it for the project in hand? Sincerely, David

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Looking for a Python Ajax Middleware script
by David Shi 31 Oct '08

31 Oct '08

Has anyone tried the following with Python? 1. Put a code into the script like Feedback. The code is actually a data processing program/script, which runs about 1 or 2 minutes, generates a new file on the server for users to download. Or the code/script of data processing sits outside and can be called/fired off to run within something like the feedback. It does the same thing as I stated above. 2. While data processing is going on, there will be no data passed back from the server to clients. How do we have a screen for end users to look at and telling them that data processing is going on? Perhaps a cranking engine turning. 3. Automated registration, authentication and session management? Linking to registration and authentication is an automated process of allocating temporary folders for each user on the server? Have you come across to these? Frankly speaking, I am not a programmer, but got thrown into the situation. I am using IIS 6.0 and Windows Server 2003. It can allow Microsoft's .NET service. I think that what ideally I need is a Python middleware script which manages the dynamic UI interfaces and data processing engines. Your suggestions and recommendations will be deeply appreciated. Sincerely, David

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Looking for a Python Ajax Middleware script
by David Shi 30 Oct '08

30 Oct '08

Have you tried the following with Python? 1. Put a code into the script like Feedback. The code is actually a data processing program/script, which runs about 1 or 2 minutes, generates a new file on the server for users to download. Or the code/script of data processing sits outside and can be called/fired off to run within something like the feedback. It does the same thing as I stated above. 2. While data processing is going on, there will be no data passed back from the server to clients. How do we have a screen for end users to look at and telling them that data processing is going on? Perhaps a cranking engine turning. 3. Automated registration, authentication and session management? Linking to registration and authentication is an automated process of allocating temporary folders for each user on the server? Have you come across to these? Frankly speaking, I am not a programmer, but got thrown into the situation. I am using IIS 6.0 and Windows Server 2003. It can allow Microsoft's .NET service. I think that what ideally I need is a Python middleware script which manages the dynamic UI interfaces and data processing engines. Your suggestions and recommendations will be deeply appreciated. Sincerely, David

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System.TypeInitializationException
by Sandro Hardy 23 Oct '08

23 Oct '08

Hi, this Code: --------------------------------------------------------- def stateChanged(): print "sdf" bb.WiimoteChanged += System.EventHandler(stateChanged); --------------------------------------------------------- ist working in a cygwin xterm. (no python installed in cygwin) But ist gives me this error in a Windows shell: Unhandled Exception: System.TypeInitializationException: The type initializer fo r 'Python.Runtime.CodeGenerator' threw an exception. ---> System.InvalidCastExce ption: Unable to cast object of type 'System.Reflection.Module' to type 'System. Reflection.Emit.ModuleBuilder'. at System.Reflection.Emit.AssemblyBuilderData.GetInMemoryAssemblyModule() at System.AppDomain.InternalDefineDynamicAssembly(AssemblyName name, Assembly BuilderAccess access, String dir, Evidence evidence, PermissionSet requiredPermi ssions, PermissionSet optionalPermissions, PermissionSet refusedPermissions, Sta ckCrawlMark& stackMark, IEnumerable`1 unsafeAssemblyAttributes) at System.AppDomain.DefineDynamicAssembly(AssemblyName name, AssemblyBuilderA ccess access) at Python.Runtime.CodeGenerator..cctor() --- End of inner exception stack trace --- at Python.Runtime.DelegateManager.GetDispatcher(Type dtype) at Python.Runtime.DelegateManager.GetDelegate(Type dtype, IntPtr callable) at Python.Runtime.DelegateObject.tp_new(IntPtr tp, IntPtr args, IntPtr kw) at e__NativeCall.Call_3(IntPtr , IntPtr , IntPtr , IntPtr ) at Python.Runtime.MetaType.tp_call(IntPtr tp, IntPtr args, IntPtr kw) at Python.Runtime.Runtime.Py_Main(Int32 argc, String[] argv) at Python.Runtime.PythonConsole.Main(String[] args) Any hints? Regards, Sandro

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can i use LabVIEW VI in Python Script?
by sambasivareddy 15 Oct '08

15 Oct '08

Hi all, I have a doubt in Python.Net. if any one knows plz give reponse for this. * Can i use LabVIEW VI in Python Script? Thanks and Regards, Sambasivareddy.S http://www.patni.com World-Wide Partnerships. World-Class Solutions. _____________________________________________________________________ This e-mail message may contain proprietary, confidential or legally privileged information for the sole use of the person or entity to whom this message was originally addressed. Any review, e-transmission dissemination or other use of or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you have received this e-mail in error kindly delete this e-mail from your records. If it appears that this mail has been forwarded to you without proper authority, please notify us immediately at netadmin(a)patni.com and delete this mail. _____________________________________________________________________

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struct with no explicit constructor
by Jeff Ames 15 Oct '08

15 Oct '08

Hello, I'm trying to create an instance of a struct that has no explicit constructor in C#, but in python I always get a TypeError. My test struct in C#: namespace Foo { public struct MyStruct { public int x; } } In python: mystruct = Foo.MyStruct() This gives me "TypeError: no constructor matches given arguments". I get slightly further calling __new__ explicitly: mystruct = object.__new__(Foo.MyStruct) mystruct.__init__() However, then I get an exception from when mystruct goes out of scope: Unhandled Exception: System.ArgumentException: GCHandle value cannot be zero at System.Runtime.InteropServices.GCHandle.op_Explicit (IntPtr value) [0x00000] at Python.Runtime.ManagedType.GetManagedObject (IntPtr ob) [0x00000] at Python.Runtime.ClassBase.tp_dealloc (IntPtr ob) [0x00000] at (wrapper native-to-managed) Python.Runtime.ClassBase:tp_dealloc (intptr) at (wrapper managed-to-native) Python.Runtime.Runtime:Py_Main (int,string[]) at Python.Runtime.PythonConsole.Main (System.String[] args) [0x00000] If I add an explicit constructor to MyStruct, everything works fine, but this is a third-party library that I'd like to use as-is if possible. Is there any way to do this? Thanks, Jeff

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Can you unsubscribe me please
by David Thomson 02 Oct '08

02 Oct '08

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Re: [Python.NET] error messages
by Dirk Krause 30 Sep '08

30 Sep '08

OK, it works now, thanks to both of you for the trick! (it's u'2.0.50727.1434' here) I applied that patch that was mentioned in Feihong's blog post from the mailing list and built that thing and it works - all three demos running now, and Feihongs test, too. Just to reiiterate the posting that made the difference: http://mail.python.org/pipermail/pythondotnet/2008-January/000771.html Index: pythonnet/src/runtime/assemblymanager.cs =================================================================== --- pythonnet/src/runtime/assemblymanager.cs (révision 90) +++ pythonnet/src/runtime/assemblymanager.cs (copie de travail) @@ -87,7 +87,12 @@ static void AssemblyLoadHandler(Object ob, AssemblyLoadEventArgs args){ Assembly assembly = args.LoadedAssembly; assemblies.Add(assembly); - ScanAssembly(assembly); + // .NET v2.0 SP1 bug workaround ; ScanAssembly called on newly created DynamicAssembly causes problems + // only scan non-dynamic assemblies... + if ( !(assembly is System.Reflection.Emit.AssemblyBuilder) ) + { + ScanAssembly(assembly); + } } ________________________________ Von: Craig Farrow [mailto:craig_farrow@sil.org] Gesendet: Mi 01.10.2008 05:08 An: Dirk Krause Cc: Feihong Hsu Betreff: Re: AW: AW: [Python.NET] error messages Dirk, Disabling that button.Click line makes helloform.py work for me, too. It looks like the Great Firewall is blocking googlepages.com, so unfortunately I can't try that fix -- but that sounds like the right direction. Here's how to get the version of .NET being used: >>> from System import Environment >>> Environment.Version.ToString() u'2.0.50727.1433' >>> Craig. 10/1/2008 2:57 AM dï, Dirk Krause pisdimis: hmmm ... I have SP1 for sure, but also .NET 3.5 - maybe that is the problem? ________________________________ Von: Feihong Hsu [mailto:hsu.feihong@yahoo.com] Gesendet: Di 30.09.2008 20:44 An: Craig Farrow; Dirk Krause Cc: pythondotnet(a)python.org Betreff: Re: AW: [Python.NET] error messages Usually you can find a clue by looking in Control Panel > Add/Remove Programs. If you got SP1 or something like that, it'll be listed. --- On Tue, 9/30/08, Dirk Krause <dirk.krause(a)pixelpark.com> <mailto:dirk.krause@pixelpark.com> wrote: From: Dirk Krause <dirk.krause(a)pixelpark.com> <mailto:dirk.krause@pixelpark.com> Subject: AW: [Python.NET] error messages To: "Feihong Hsu" <hsu.feihong(a)yahoo.com> <mailto:hsu.feihong@yahoo.com> , "Craig Farrow" <craig_farrow(a)sil.org> <mailto:craig_farrow@sil.org> Cc: pythondotnet(a)python.org Date: Tuesday, September 30, 2008, 12:35 PM nah, doesnt work here: D:\projects\pyov>helloform.py Unbehandelte Ausnahme: System.IO.FileLoadException: Die Datei oder Assembly Python.Runtime, Version=2.0.0.2, Culture=neu tral, PublicKeyToken=64e14e845abf2e60 oder eine Abhängigkeit davon wurde nicht gefunden. Die gefundene Manifestdefinitio n der Assembly stimmt nicht mit dem Assemblyverweis überein. (Ausnahme von HRESULT: 0x80131040) Dateiname: Python.Runtime, Version=2.0.0.2, Culture=neutral, PublicKeyToken=64e14e845abf2e60 bei Python.Runtime.PythonConsole.Main(String[] args) I probably have to compile it. Is there a way to find out which .NET version is installed? ________________________________ Von: Feihong Hsu [mailto:hsu.feihong@yahoo.com] Gesendet: Di 30.09.2008 18:56 An: Craig Farrow; Dirk Krause Cc: pythondotnet(a)python.org Betreff: Re: [Python.NET] error messages This problem sounds familiar. Perhaps you guys are using .NET 2.0 with SP1 applied? Then this blog post of mine might help: http://feihonghsu.blogspot.com/2008/02/pythonnet-20-for-net-sp1_15.html If you want, you can try the binary that I made instead of applying the patch yourself. --- On Tue, 9/30/08, Dirk Krause <dirk.krause(a)pixelpark.com> <mailto:dirk.krause@pixelpark.com> wrote: From: Dirk Krause <dirk.krause(a)pixelpark.com> <mailto:dirk.krause@pixelpark.com> Subject: Re: [Python.NET] error messages To: "Craig Farrow" <craig_farrow(a)sil.org> <mailto:craig_farrow@sil.org> Cc: pythondotnet(a)python.org Date: Tuesday, September 30, 2008, 8:50 AM right you are again. splitter works here, too. Can you confirm that helloform runs when you disable line 33? # Register the event handler # self.button.Click += self.button_Click ________________________________ Von: Craig Farrow [mailto:craig_farrow@sil.org] Gesendet: Di 30.09.2008 15:25 An: Dirk Krause Cc: pythondotnet(a)python.org Betreff: Re: AW: [Python.NET] error messages Ah, yes. On my system (Vista, Python 2.4 or 2.5, pythonnet-2.0-alpha2) only splitter.py works out of the three demos. I haven't tried to figure out why... Craig. 9/30/2008 9:13 PM dï, Dirk Krause pisdimis: much better! ...python itself runs now. but not really good either, trying to run helloform.py gives me: D:\projects\pyov>helloform.py Unbehandelte Ausnahme: System.TypeInitializationException: Der Typeninitialisierer für Python.Runtime.CodeGenerator hat eine Ausnahme verursacht. ---> System.InvalidCastException: Das Objekt des Typs System.Reflection.Module kann nicht in T yp System.Reflection.Emit.ModuleBuilder umgewandelt werden. bei System.Reflection.Emit.AssemblyBuilderData.GetInMemoryAssemblyModule() bei System.AppDomain.InternalDefineDynamicAssembly(AssemblyName name, AssemblyBuilderAccess access, String dir, Evide nce evidence, PermissionSet requiredPermissions, PermissionSet optionalPermissions, PermissionSet refusedPermissions, St ackCrawlMark& stackMark, IEnumerable`1 unsafeAssemblyAttributes) bei System.AppDomain.DefineDynamicAssembly(AssemblyName name, AssemblyBuilderAccess access) bei Python.Runtime.CodeGenerator..cctor() --- Ende der internen Ausnahmestapelüberwachung --- bei Python.Runtime.DelegateManager.GetDispatcher(Type dtype) bei Python.Runtime.DelegateManager.GetDelegate(Type dtype, IntPtr callable) bei Python.Runtime.EventObject.AddEventHandler(IntPtr target, IntPtr handler) bei Python.Runtime.EventBinding.nb_inplace_add(IntPtr ob, IntPtr arg) bei Python.Runtime.Runtime.PyObject_Call(IntPtr pointer, IntPtr args, IntPtr kw) bei Python.Runtime.MetaType.tp_call(IntPtr tp, IntPtr args, IntPtr kw) bei Python.Runtime.Runtime.Py_Main(Int32 argc, String[] argv) bei Python.Runtime.PythonConsole.Main(String[] args) ________________________________ Von: Craig Farrow [mailto:craig_farrow@sil.org] Gesendet: Di 30.09.2008 14:53 An: Dirk Krause Cc: pythondotnet(a)python.org Betreff: Re: [Python.NET] error messages Try the UCS2 directory. Craig. 9/30/2008 5:54 PM dï, Dirk Krause pisdimis: Hi, I get the following error message when trying to run the python.exe from python2.5-UCS4 (I have a fully installed Python 2.5), any ideas? Vista professional here. ... unfortunately in german: """ Unbehandelte Ausnahme: System.IO.FileLoadException: Die Datei oder Assembly Python.Runtime, Version=0.0.0.0, Culture=neu tral, PublicKeyToken=null oder eine Abhängigkeit davon wurde nicht gefunden. Die gefundene Manifestdefinition der Assemb ly stimmt nicht mit dem Assemblyverweis überein. (Ausnahme von HRESULT: 0x80131040) Dateiname: Python.Runtime, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null bei Python.Runtime.Runtime.PyUnicode_FromUnicode(String s, Int32 size) bei Python.Runtime.Runtime.Initialize() bei Python.Runtime.PythonEngine.Initialize() bei Python.Runtime.PythonConsole.Main(String[] args) """ Thanks, Dirk ________________________________ _________________________________________________ Python.NET mailing list - PythonDotNet(a)python.org http://mail.python.org/mailman/listinfo/pythondotnet _________________________________________________ Python.NET mailing list - PythonDotNet(a)python.org http://mail.python.org/mailman/listinfo/pythondotnet

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