Re: Issue sending data from C++ to Python

Pablo Martinez Ulloa wrote at 2022-5-18 15:08 +0100: >I have been using your C++ Python API, in order to establish a bridge from >C++ to Python. Do you know `cython`? It can help very much in the implementation of bridges between Python and C/C++. -- https://mail.python.org/mailman/li

Re: Issue sending data from C++ to Python

Am 18.05.22 um 16:08 schrieb Pablo Martinez Ulloa: I have been using your C++ Python API, in order to establish a bridge from C++ to Python. We want to do this, as we have a tactile sensor, which only has a library developed in C++, but we want to obtain the data in real time in Python to

Re: Issue sending data from C++ to Python

On 2022-05-18 15:08, Pablo Martinez Ulloa wrote: Hello, I have been using your C++ Python API, in order to establish a bridge from C++ to Python. We want to do this, as we have a tactile sensor, which only has a library developed in C++, but we want to obtain the data in real time in Python to

Issue sending data from C++ to Python

Hello, I have been using your C++ Python API, in order to establish a bridge from C++ to Python. We want to do this, as we have a tactile sensor, which only has a library developed in C++, but we want to obtain the data in real time in Python to perform tests with a robotic arm and gripper. The

Re: how to create an external string when binding C to Python?

On Thu, May 8, 2014 at 5:10 PM, Simon wrote: > I'd like to make a C memory buffer available inside Python via the Python > C/API without copying that memory into Python. How to do this? I've read [1] > but it's not clear that this functionality exists. In javascript it's > possible using String

Re: how to create an external string when binding C to Python?

On 09/05/2014 00:10, Simon wrote: I'd like to make a C memory buffer available inside Python via the Python C/API without copying that memory into Python. How to do this? I've read [1] but it's not clear that this functionality exists. In javascript it's possible using String::NewExternal() [2

how to create a zero copy external string when binding C to Python?

I'd like to make a C memory buffer available inside Python via the Python C/API without copying that memory into Python. How to do this? I've read [1] but it's not clear that this functionality exists. In javascript it's possible using String::NewExternal() [2]. "Creates a new external string u

how to create an external string when binding C to Python?

I'd like to make a C memory buffer available inside Python via the Python C/API without copying that memory into Python. How to do this? I've read [1] but it's not clear that this functionality exists. In javascript it's possible using String::NewExternal() [2]. "Creates a new external string u

Re: C++ to python for LED Matrix

Yes you could use Python for this sort of thing. The link you posted is just using a kernel spi driver that Python can write to just as well as C++ can (via it's /dev/spidev0.0 file). There is a python library that can talk to SPI in Python on the pi: http://www.100randomtasks.com/simple-spi-on-

C++ to python for LED Matrix

Hey folks, So the last week or so I've been searching this site for information on how to control and program a LED Matrix (or a number of them) for a project. A few Topics have caught my eye, with me originally having in mind using a Maxim MAX7221 to control the matrix, but none more than Klaa

Re: Porting the 2-3 heap data-structure library from C to Python

Hrvoje Niksic, 11.03.2012 02:03: > Stefan Behnel writes: >>> which is the standard way of extending Python with high-performance >>> (and/or system-specific) C code. >> >> Well, it's *one* way. Certainly not the easiest way, neither the most >> portable and you'll have a hard time making it the fa

Re: Porting the 2-3 heap data-structure library from C to Python

On 3/10/2012 8:03 PM, Hrvoje Niksic wrote: Stefan Behnel writes: which is the standard way of extending Python with high-performance (and/or system-specific) C code. Well, it's *one* way. Certainly not the easiest way, neither the most portable and you'll have a hard time making it the fast

Re: Porting the 2-3 heap data-structure library from C to Python

Stefan Behnel writes: >> which is the standard way of extending Python with high-performance >> (and/or system-specific) C code. > > Well, it's *one* way. Certainly not the easiest way, neither the most > portable and you'll have a hard time making it the fastest. I didn't say it was easy, but

Re: Porting the 2-3 heap data-structure library from C to Python

Hrvoje Niksic, 07.03.2012 16:48: > Alec Taylor writes: > >> The source-code used has been made available: >> http://www.cosc.canterbury.ac.nz/research/RG/alg/ttheap.h >> http://www.cosc.canterbury.ac.nz/research/RG/alg/ttheap.c >> >> I plan on wrapping it in a class. > > You should get acquainted

Re: Porting the 2-3 heap data-structure library from C to Python

Alec Taylor writes: > The source-code used has been made available: > http://www.cosc.canterbury.ac.nz/research/RG/alg/ttheap.h > http://www.cosc.canterbury.ac.nz/research/RG/alg/ttheap.c > > I plan on wrapping it in a class. You should get acquainted with the Python/C API, which is the standard

Re: Porting the 2-3 heap data-structure library from C to Python

m/2009/01/25/calling-c-functions-inside-python/) > and it seems to work, but this might not be the recommended method. > > Any best practices for how best to wrap the 2-3 heap data-structure > from C to Python? For data structures, where performance tends to matter, it's usuall

Porting the 2-3 heap data-structure library from C to Python

recommended method. Any best practices for how best to wrap the 2-3 heap data-structure from C to Python? Thanks for all suggestions, Alec Taylor -- http://mail.python.org/mailman/listinfo/python-list

Re: Round Trip: C to Python to C Module

On Nov 19, 11:05 am, Eric Frederich wrote: > I have a proprietary software PropSoft that I need to extend. > They support extensions written in C that can link against PropLib to > interact with the system. > > I have a Python C module that wraps a couple PropLib functions that I > call PyProp.>Fr

Re: Round Trip: C to Python to C Module

Eric Frederich writes: > I have a proprietary software PropSoft that I need to extend. > They support extensions written in C that can link against PropLib to > interact with the system. > > I have a Python C module that wraps a couple PropLib functions that I > call PyProp. >>From an interactive

Round Trip: C to Python to C Module

I have a proprietary software PropSoft that I need to extend. They support extensions written in C that can link against PropLib to interact with the system. I have a Python C module that wraps a couple PropLib functions that I call PyProp. >From an interactive Python shell I can import PyProp and

Re: C to Python

Benjamin Peterson, 10.12.2009 20:26: > Emeka writes: >> I am finding it difficult getting my head around PyObject_CallObject(x,y). I > need a gentle and thorough introduction to it. I also need examples. Could > someone come to my need? > > PyObject_CallFunction is probably easier to use. Hmm, I

Re: C to Python

Emeka gmail.com> writes: > > > Hello All, >   > I am finding it difficult getting my head around PyObject_CallObject(x,y). I need a gentle and thorough introduction to it. I also need examples. Could someone come to my need? PyObject_CallFunction is probably easier to use. http://docs.python.o

C to Python

Hello All, I am finding it difficult getting my head around PyObject_CallObject(x,y). I need a gentle and thorough introduction to it. I also need examples. Could someone come to my need? Thanks. Janus. -- http://mail.python.org/mailman/listinfo/python-list

Re: Passing python list from C to python

In article <94c1adf3-a25d-4ae5-9f38-7ca8680d0...@b14g2000yqd.googlegroups.com>, hartley wrote: >On Jul 16, 9:26=A0pm, a...@pythoncraft.com (Aahz) wrote: >> In article <0afc5c4d-1af5-4d0e-9442-26b51b12e...@m11g2000yqh.googlegroups= >.com>, >> hartley =A0 wrote: >>> >>>If you had loosened up on the

Re: Passing python list from C to python

On Jul 16, 9:26 pm, a...@pythoncraft.com (Aahz) wrote: > In article > <0afc5c4d-1af5-4d0e-9442-26b51b12e...@m11g2000yqh.googlegroups.com>, > > hartley   wrote: > > >If you had loosened up on the sarcasm I would probably have read what > >you wrote more thoroughly instead of just skimming through i

Re: Passing python list from C to python

In article <0afc5c4d-1af5-4d0e-9442-26b51b12e...@m11g2000yqh.googlegroups.com>, hartley wrote: > >If you had loosened up on the sarcasm I would probably have read what >you wrote more thoroughly instead of just skimming through it. Thanks >for the help, but you should seriously consider doing som

Re: Passing python list from C to python

On Jul 16, 11:13 pm, hartley wrote: > /* the first telling */ > (...) > /* the second telling */ > (...) > /* the third telling */ > > - > If you had loosened up on the sarcasm That wasn't sarcasm, it was an attempt at humourous watering-down the expression of exasperation at continued ignoring o

Re: Passing python list from C to python

/* the first telling */ (...) /* the second telling */ (...) /* the third telling */ - If you had loosened up on the sarcasm I would probably have read what you wrote more thoroughly instead of just skimming through it. Thanks for the help, but you should seriously consider doing something with yo

Re: Passing python list from C to python

/* the first telling */ (...) /* the third telling */ (...) /* the third telling */ - If you had loosened up on the sarcasm I would probably have read what you wrote more thoroughly instead of just skimming through it. Thanks for the help, but you should seriously consider doing something with yo

Re: Passing python list from C to python

On Jul 15, 7:54 pm, hartley wrote: > On Jul 14, 2:21 pm, John Machin wrote: > > On Jul 14, 7:22 pm, hartley wrote:> > > I'm very new > > at wrapping Python/C, and I have run into some problems. [snip] /* the first telling */ > > > > statement C_embedding.buff = the_pylist ? > > > > > BTW C-em

Re: Passing python list from C to python

On Jul 14, 2:21 pm, John Machin wrote: > On Jul 14, 7:22 pm, hartley wrote:> > > I'm very new at > wrapping Python/C, and I have run into some problems. > > [snip] > > > > > > >         pValue = PyObject_CallObject(pFunc,NULL); > > > > > pValue is now a PyList - i've even verified this with: > >

Re: Passing python list from C to python

On Jul 14, 7:22 pm, hartley wrote: > > > I'm very new at wrapping Python/C, and I have run into some problems. [snip] > > >         pValue = PyObject_CallObject(pFunc,NULL); > > > > pValue is now a PyList - i've even verified this with: > > > > int a = PyList_Check(pValue); > > >         printf("

Re: Passing python list from C to python

On Jul 13, 6:35 pm, John Machin wrote: > On Jul 14, 1:47 am, hartley wrote: > > > > > I'm very new at wrapping Python/C, and I have run into some problems. > > > I have one python module that provides me with a list (provideBuffer > > in provideBuff.py): > > >  Py_Initialize(); > >         pName

Re: Passing python list from C to python

> > I'm very new at wrapping Python/C, and I have run into some problems. > > > I have one python module that provides me with a list (provideBuffer > > in provideBuff.py): > > >  Py_Initialize(); > >         pName = PyString_FromString("provideBuff"); > >         pModule = PyImport_Import(pName);

Re: Passing python list from C to python

On Jul 14, 1:47 am, hartley wrote: > I'm very new at wrapping Python/C, and I have run into some problems. > > I have one python module that provides me with a list (provideBuffer > in provideBuff.py): > >  Py_Initialize(); >         pName = PyString_FromString("provideBuff"); >         pModule =

Passing python list from C to python

I'm very new at wrapping Python/C, and I have run into some problems. I have one python module that provides me with a list (provideBuffer in provideBuff.py): Py_Initialize(); pName = PyString_FromString("provideBuff"); pModule = PyImport_Import(pName); pFunc = PyObject_

Re: SWIG, c++ to Python: array of pointers (double pointer) not working

On Mar 14, 5:22 am, Matteo wrote: > Re-posting in more simple and precise terms from a previous > threadhttp://groups.google.it/group/comp.lang.python/browse_thread/thread/6... > > Problem: > SWIG doesn't properly wrap c++ arrays of pointers, therefore when you > try to call a c++ function which

SWIG, c++ to Python: array of pointers (double pointer) not working

Re-posting in more simple and precise terms from a previous thread http://groups.google.it/group/comp.lang.python/browse_thread/thread/6dd7bd9a09b8a011/5119cf15ebfa38b8 Problem: SWIG doesn't properly wrap c++ arrays of pointers, therefore when you try to call a c++ function which requires them, a

Re: Mapping 64 bit int from C to Python-2.2

On 10/03/2009 2:51 AM, Explore_Imagination wrote: Hi I want to map 64 bit integers from C to python. I must use Python 2.2 BUT There is no support for 64 bits integers in Python2.2 (Supported in 2.5). Now the problem is that I have these four variables: unit32_t a,b,c; uint64_t w,x,y,z; I

Re: Mapping 64 bit int from C to Python-2.2 ?????

> Any Suggestions? Read all of the responses you got the last time you posted the very same article. Regards, Martin -- http://mail.python.org/mailman/listinfo/python-list

Mapping 64 bit int from C to Python-2.2 ?????

Hi I want to map 64 bit integers from C to python. I must use Python 2.2 BUT There is no support for 64 bits integers in Python2.2 (Supported in 2.5). Now the problem is that I have following variables: unit32_t a,b,c; uint64_t w,x,y,z; I use this funtion to map values: Py_BuildValue

Re: Mapping 64 bit int from C to Python-2.2

On Mar 9, 5:57 pm, MRAB wrote: > Explore_Imagination wrote: > > Hi > > > I want to map 64 bit integers from C to python. I must use Python 2.2 > > BUT There is no support for 64 bits integers in Python2.2 (Supported > > in 2.5). > > > Now the prob

Re: Mapping 64 bit int from C to Python-2.2

On Mar 9, 5:57 pm, MRAB wrote: > Explore_Imagination wrote: > > Hi > > > I want to map 64 bit integers from C to python. I must use Python 2.2 > > BUT There is no support for 64 bits integers in Python2.2 (Supported > > in 2.5). > > > Now the prob

Re: Mapping 64 bit int from C to Python-2.2

On Mar 9, 5:57 pm, MRAB wrote: > Explore_Imagination wrote: > > Hi > > > I want to map 64 bit integers from C to python. I must use Python 2.2 > > BUT There is no support for 64 bits integers in Python2.2 (Supported > > in 2.5). > > > Now the prob

Re: Mapping 64 bit int from C to Python-2.2

En Mon, 09 Mar 2009 13:51:59 -0200, Explore_Imagination escribió: I want to map 64 bit integers from C to python. I must use Python 2.2 BUT There is no support for 64 bits integers in Python2.2 (Supported in 2.5). Now the problem is that I have these four variables: unit32_t a,b,c

Re: Mapping 64 bit int from C to Python-2.2

On Mar 9, 11:51 am, Explore_Imagination wrote: > Hi > > I want to map 64 bit integers from C to python. I must use Python 2.2 > BUT There is no support for 64 bits integers in Python2.2 (Supported > in 2.5). > > Now the problem is that I have these four variables: > > u

Re: Mapping 64 bit int from C to Python-2.2

Explore_Imagination wrote: Hi I want to map 64 bit integers from C to python. I must use Python 2.2 BUT There is no support for 64 bits integers in Python2.2 (Supported in 2.5). Now the problem is that I have these four variables: unit32_t a,b,c; uint64_t w,x,y,z; I use this funtion to map

Mapping 64 bit int from C to Python-2.2

Hi I want to map 64 bit integers from C to python. I must use Python 2.2 BUT There is no support for 64 bits integers in Python2.2 (Supported in 2.5). Now the problem is that I have these four variables: unit32_t a,b,c; uint64_t w,x,y,z; I use this funtion to map values: Py_BuildValue

Re: C to python conversion

On Apr 13, 7:58 am, "Gabriel Genellina" <[EMAIL PROTECTED]> wrote: > En Sat, 12 Apr 2008 07:58:47 -0300, Michele Petrazzo > <[EMAIL PROTECTED]> escribió: > > > > > Hi all, > > I'm trying to translate a simple C code into a python + ctypes (where > > need), but I have some problems on char conversio

Re: C to python conversion

En Sat, 12 Apr 2008 07:58:47 -0300, Michele Petrazzo <[EMAIL PROTECTED]> escribió: > Hi all, > I'm trying to translate a simple C code into a python + ctypes (where > need), but I have some problems on char conversion. The code have > to work on Linux and talk with the serial port. I think that

Re: C to python conversion

On Apr 12, 5:58 am, Michele Petrazzo <[EMAIL PROTECTED]> wrote: > Hi all, > I'm trying to translate a simple C code into a python + ctypes (where > need), but I have some problems on char conversion. The code have > to work on Linux and talk with the serial port. I think that the problem > is that

C to python conversion

Hi all, I'm trying to translate a simple C code into a python + ctypes (where need), but I have some problems on char conversion. The code have to work on Linux and talk with the serial port. I think that the problem is that I don't translate correctly the strings. C code: #define START 0x33 #defi

Re: newbie swig c++ to python

Now it works, the problem was in the project configuration of the example, that put the directory in Addictional Dependencies while it must be in Addictional Library Directories bye w n 7 Ott, 18:35, whatazor <[EMAIL PROTECTED]> wrote: > Hi all, > I must wrap some c++ code in python with swig. I

newbie swig c++ to python

Hi all, I must wrap some c++ code in python with swig. I try the swig examples for VC++ , but when I build the project it gives me that error: example fatal error LNK1181: cannot open input file 'C:\Programmi \Python25\libs.obj' Any idea? thank you w -- http://mail.python.org/mailman/listinfo/

Re: return tuple from C to python (extending python)

Farshid Lashkari wrote: > Simon Forman wrote: > > I have not done a great deal of extension work with python, however, I > > do not believe you can simply cast an int (or pointer to int, which is > > what you say dat is declared as, unless my C is /really/ rusty) to > > PyObject*. > > > > I think

Re: return tuple from C to python (extending python)

On Tue, 2006-10-24 at 15:24 -0700, Kiran wrote: > Hi all, I want to make python call some C functions, process them and > return them. Try comp.lang.python -- Andrew Poelstra -- http://mail.python.org/mailman/listinfo/python-list

Re: return tuple from C to python (extending python)

"Kiran" <[EMAIL PROTECTED]> writes: > PyObject* toRet; > toRet = PyTuple_New(num_addr); > > then, in a for loop, i assign values to the tuple as follows: > > for ( i = 0; i < num_addr; i++ ) > { > printf("%d\n", dat[i]); > PyTuple_SET_ITEM(toRet, i, (PyObject*)dat[i] ); > }

Re: return tuple from C to python (extending python)

Simon Forman wrote: > I have not done a great deal of extension work with python, however, I > do not believe you can simply cast an int (or pointer to int, which is > what you say dat is declared as, unless my C is /really/ rusty) to > PyObject*. > > I think you need to do something like Py_Build

Re: return tuple from C to python (extending python)

Kiran wrote: > Hi all, I want to make python call some C functions, process them and > return them. > > Ok, I got all the wrapper functions and everything setup right. Here > is my problem. What I need to do is to return a tuple from C to > python. > > To go about doin

return tuple from C to python (extending python)

Hi all, I want to make python call some C functions, process them and return them. Ok, I got all the wrapper functions and everything setup right. Here is my problem. What I need to do is to return a tuple from C to python. To go about doing this, I first create a tuple object in C doing the

Re: C++ to Python?

Roman Yakovenko wrote: > you want to find some kind of "translator" > > C++ code: >std::cout << 1; > translator output: >print 1 > > Am I right? If so, I am pretty sure that such "translator" does not > exist - too complex. ...however such a "refactor" is easy for a human to do. What t

Re: C++ to Python?

On 10/10/06, Frank Martinez <[EMAIL PROTECTED]> wrote: > Hi, Roman. > Thanks. I seem a bit confused. Does Py++ actually convert the C++ code to > Python or does it just provide a wrapper to C++ code? A second one. Now when I read your mail one more time, I think I was wrong, because you want to

Re: C++ to Python?

Hi, Roman. Thanks.  I seem a bit confused.  Does Py++ actually convert the C++ code to Python or does it just provide a wrapper to C++ code? You say tomater, I zader matermorts. -- Coach Z, Homestarrunner.com On Oct 10, 2006, at 3:55 PM, Roman Yakovenko wrote:On 10/10/06, Frank Martinez <[EMAIL PRO

Re: C++ to Python?

On 10/10/06, Frank Martinez <[EMAIL PROTECTED]> wrote: > Hi, Everybody! > Does anyone know of a cpp2py type application? Without going into details, > I need to port a bunch of C++ code to Python. Any such > converter/information would be helpful. > Thanks. Take a look on Py++( http://language

C++ to Python?

Hi, Everybody! Does anyone know of a cpp2py type application?  Without going into details, I need to port a bunch of C++ code to Python.  Any such converter/information would be helpful. Thanks. Hi, my name is Ray and, on Yesterday, my Daughter called me. -- A man named 'Ray'. -- http://mail.pytho

C++ to python with boost.python: Exposing virtual bool operator()(int )=0

Hello pythonians! ;-D , I have a little problem when I expose (assisted by boost.python) classes with virtual functions, specially with operator(). In the C++ code below I test two different implementations of a member function of A that takes as an argument the abstract class Base (see Option 1

Re: Sharing database connection from C to Python

[EMAIL PROTECTED] wrote: > I'm developing an application using the C language and Python for it's > plugins. The C program connects to a MySQL database and keeps that > connection active. Is it possible to 'share' this connection with the > Python plugins? If so, is there a "standard" way to do tha

Sharing database connection from C to Python

Hi, I'm developing an application using the C language and Python for it's plugins. The C program connects to a MySQL database and keeps that connection active. Is it possible to 'share' this connection with the Python plugins? If so, is there a "standard" way to do that? Thank you. DG -- http

Re: moving from c++ to python

> "Michael" == Michael <[EMAIL PROTECTED]> writes: Michael> me?? My biggest confusion so far is the lack of pointers Michael> in Python .. Achtually, python uses pointers for everything. On the contrary there are no "value types" in python. MyClass* c = new MyClass(12,13); is e

Re: moving from c++ to python

On Saturday 21 May 2005 03:19 am, Michael wrote: Yeah this tutorial is aimed at people that already know how to program. http://www.diveintopython.org/ It would still be a good idea though to go through the basic python tutorial at http://docs.python.org/tut/tut.html For someone already exp

Re: moving from c++ to python

Michael wrote: > Hi, > I'm a pretty sound programmer in C++, but would like to learn python! Does > anyone know of any tutorial s aimed at me?? My biggest confusion so far is > the lack of pointers in Python .. > Regards > > > Michael > > I suggest that you start with the official Python t

moving from c++ to python

Hi, I'm a pretty sound programmer in C++, but would like to learn python! Does anyone know of any tutorial s aimed at me?? My biggest confusion so far is the lack of pointers in Python .. Regards Michael -- http://mail.python.org/mailman/listinfo/python-list

Re: newbie question convert C to python

On Tue, 2005-02-15 at 11:03, Steven Bethard wrote: > Paul Rubin wrote: > > [EMAIL PROTECTED] writes: > > > >>How do i handle this piece of code in python: > >> > >># define vZero 15 > >># define vOne 20 > >> > >>unsigned int vTable[Zero][One] > >> > >>if(vGroup[vZero][vOne] == 0) > >>{ > >>

Re: newbie question convert C to python

Paul Rubin wrote: [EMAIL PROTECTED] writes: How do i handle this piece of code in python: # define vZero 15 # define vOne 20 unsigned int vTable[Zero][One] if(vGroup[vZero][vOne] == 0) { vGroup[vZero][vOne]-- . . } Simplest might be with a dictionary: vGroup =

Re: newbie question convert C to python

[EMAIL PROTECTED] writes: > How do i handle this piece of code in python: > > # define vZero 15 > # define vOne 20 > > unsigned int vTable[Zero][One] > > if(vGroup[vZero][vOne] == 0) > { > vGroup[vZero][vOne]-- > . > . > } Simplest might be with a dic

newbie question convert C to python

How do i handle this piece of code in python: # define vZero 15 # define vOne 20 unsigned int vTable[Zero][One] if(vGroup[vZero][vOne] == 0) { vGroup[vZero][vOne]-- . . } Thanks, -d4 -- http://mail.python.org/mailman/listinfo/python-list