Mailman 3 December 2008 - Python.NET

Extracting data from XML containing CDATA and store data in a .dbf file
by David Shi 18 Dec '08

18 Dec '08

I am looking for advice/efficient script to extract data from XML containing CDATA. I wish to extract all the data and store it in a .dbf file. Regards. David

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Where does the clr in IronPython look the dll
by navneet khanna 12 Dec '08

12 Dec '08

Hello Everybody I am trying to import dll with clr.AddReference("TCdll") I am getting the following error. Traceback (most recent call last): File "<pyshell#26>", line 1, in <module> clr.AddReference("TCdll") FileNotFoundException: Unable to find assembly 'TCdll'. at Python.Runtime.CLRModule.AddReference(String name) I have loaded the dll in system32 folder. Have I loaded the dll at the right place or do I need to place it anywhere else? Waiting for your replies. Regards Navneet

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concept of creating structures in python
by navneet khanna 12 Dec '08

12 Dec '08

Hello Everybody I want to create a structure within a structure i.e. nested structures in python. I tried with everything but its not working. my code is like this: class L(Structure): def __init__(self,Name='ND',Addr=0,ds_obj = D()): self.Name = Name self.Addr = Addr self.ds_obj = ds_obj class D(Structure): def __init__(self,dataName='ND',index = 0,ele_obj=E()): self.dataName = dataName self.index = index self.ele_obj = ele_obj these are two structures. I want to refer D structure in L one and use it. I want to access the value of D structure like L.D.index = 0. Please help me Thanks in advance Navneet

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path question: clr.so being picky about paths
by Hamilton Link 04 Dec '08

04 Dec '08

In the readme, it says that "python for .net uses the pythonpath (sys.path) to look for assemblies to load, in addition to the usual application base and the gac. Unfortunately at the moment the assembly I'm trying to load is... clr.pyd. If I run python (ubuntu, mono, rebuilt python 2.5.2 with --enable-shared) from a directory where clr.pyd and Python.Runtime.dll reside, with clr.so in the lib/python2.5/site-packages folder... everything works. I can import clr and System.Drawing and make a System.Drawing.Point instance. If I run python from a directory without these libraries, in particular if I'm in my home folder somewhere and clr.pyd and Python.Runtime.dll are in the lib/python2.5/site-packages folder where I want them... import clr gives me an error trying to load some unspecified module (I suspect clr.pyd). Am I supposed to set some path or other for mono in contravention of the docs? I suspect that either clr.so can't find mono, or mono is being loaded and then can't find clr.pyd. I will continue to fiddle with this, probably Friday, if I don't get a response, but it seems like there's probably a simple answer that I'm overlooking. Setting MONO_PATH to my site-packages folder (the variable was unbound before) didn't fix it. h

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TypeError: not enough arguments
by navneet khanna 04 Dec '08

04 Dec '08

Hello Everbody I have imported a class from vb.net dll in Python. I am able to import all the functions, but its showing such error when trying to access it. g() is a simple function in dll which takes no argument but returns a string. print Class1.g() Traceback (most recent call last): File "<pyshell#29>", line 1, in <module> print Class1.g() TypeError: not enough arguments Please help me out. Thanks Navneet

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Access functions in dll class
by navneet khanna 04 Dec '08

04 Dec '08

Hello Everybody I am able to import the dll and able to access the class of the dll. But when I am trying to access the methods in the dll its showing error. #Class1 is the class in dll and next is the function. Class1.Bin_To_Dec("11") Traceback (most recent call last): File "<pyshell#5>", line 1, in <module> Class1.Bin_To_Dec("11") TypeError: No method matches given arguments Please help me to find out where am i wrong? Do I need to create object of dll class and then access it? If yes then how can I access it? Thanks Navneet

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Problem loading vb.net DLL in Python
by navneet khanna 03 Dec '08

03 Dec '08

Hello Everybody I am trying to load vb.net dll in Python, but its showing errors. >>> from ctypes import * >>> dll = windll.Userdll >>> dll <WinDLL 'Userdll', handle 1050000 at cade50> >>> dll_function1 = dll.xml_load("C:\test.xml") Traceback (most recent call last): File "<pyshell#3>", line 1, in <module> dll_function1 = dll.xml_init("C:\test.xml") File "C:\Python25\lib\ctypes\__init__.py", line 361, in __getattr__ func = self.__getitem__(name) File "C:\Python25\lib\ctypes\__init__.py", line 366, in __getitem__ func = self._FuncPtr((name_or_ordinal, self)) AttributeError: function 'xml_init' not found Userdll is a dll created in vb.net. xml_load is a function in it. I tried loading this dll in vb.net its working fine. I accessed in vb.net by referencing in settings. Do we have any such option in Python? Can I call the class of vb.net dll in Python , so that i can create its object and access its functions. Please help me out. I would be grateful to you. Thanks Navneet

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How to write a string with required color in a file with python.net?
by sambasivareddy 03 Dec '08

03 Dec '08

Hi all, I have couple of double on python futures .Quires listed below: * How to write a particular string with required/selected color in a file with python.net? Which module I need to use it? How to set color for particular string in file? --------------------------------- file=open("C:\\test\\TestResult.txt","w") file.writelines("testcase1 pass \n") file.writelines("testcase2 Faile \n") file.close() ----------------------------- I want output like this in file: testcase1 pass testcase2 Faile * How to create .exe file in python.net? I have tried with py2exe module but it is not supporting with python.net if anyone have any information or code on the same queries plz send it. thanks in advance. Regards, sambu _____________________________________________________________________ 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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How to use a Python function that returns a double array in VB vie C++
by Pieter Steenekamp 03 Dec '08

03 Dec '08

Hi all, I want to use a Python function that returns a double array in VB dot net via embedding Python in C++ dot net. Using the CLR it is easy to access C++ from VB. Then also I don't have a problem if the Python function returns a single variable of type double, using the following lines in my C++ code: myPythonObjectPointer = PyObject_CallObject(pFunc, pArgs); myCppDoubleVariable = PyFloat_AsDouble(myPyObjectPointer); (I have obviously done all the required thingies as per the Python documentation) I can further achieve what I want by changing the Python function to a number of functions, each returning a single double variable and call them one by one, using code like above, and then passing them into an array in C++, but I would prefer a more elegant way of doing it, because my return variable could have hundreds, if not thousands, of values. Can somebody help me please. Thanks Pieter Steenekamp.

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Cannot initialize OLE
by Daniele Esposti 03 Dec '08

03 Dec '08

Hi all, if I run my application (a wxPython frame with a wx.Activex Flash component) with the python.exe in pythonnet folder its work like expected. Instead, if I run my application with the standard Python interpreter, with clr.pyd in DLLs folder and Python.Runtime.dll in the same interpreter folder, I get a warnings says Cannot initialize OLE and the ActiveX is locked. I'm using Python 2.5.2 on a Windows XP SP3 machine, PythonNet 2.0-alpha2-clr2.0 compiled with VisualStudio Express 2008. Have I missing something ? Only clr.pyd and Python.Runtime.dll are needed or there are others resources to copy in Python interpreter folder ? Thanks in advance

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