cppyy is a Python module for using C++ code inside python.
Questions tagged [cppyy]
59 questions
8
votes
1 answer
How to Implement Python Interfaces for C++ Libraries
What is the best/standard way to create Python interfaces for C++ libraries?
I know this question has been asked on here before but that was in 2008 and things may/likely have changed since then.
I've looked around and tested a few different methods…
La Fon
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- 1
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7
votes
1 answer
Is there *any* solution to packaging a python app that uses cppyy?
I'm no novice when creating cross-platform runtimes of my python desktop apps. I create various tools for my undergraduates using mostly pyinstaller, cxfreeze, sometimes fbs, and sometimes briefcase. Anyone who does this one a regular basis knows…
TSeymour
- 729
- 3
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3
votes
1 answer
Using cppyy with rvalue pointers and maps
I would love to love cppyy. However the codebase I am using has heavy use of std.unique_ptr, rvalue pointers, and templates. I am confused about how to translate these into something I can call from python.
For instance, I am stuck on how to create…
shouriha
- 79
- 6
3
votes
1 answer
Cppyy cmake build unable to find LibClang
I've been trying to use cppyy to build some python bindings for a C++ library. At the moment I am using the cookiecutter recipe from here: https://github.com/camillescott/cookiecutter-cppyy-cmake
But the package is having trouble finding…
Eddie Shields
- 45
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3
votes
1 answer
Can I get the AST from cppyy
I want to get access to the AST within cppyy before the python bindings are created. I'd like to use this to generate other kinds of bindings.
I have seen cppyy-generator, but it requires a separate installation of clang on the machine. Since cppyy…
Ken
- 693
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3
votes
1 answer
cmake to bazel - cppyy - shared libraries and includepath
I wanted to use the macro cppyy_add_bindings from FindCppyy.cmake. I have to add this in a cpp/python using bazel project. How do I handle the library dependencies? Do I have to load all libraries explicitly in the py file, or is it possible to have…
user9092688
- 171
- 10
2
votes
1 answer
cppyy crash with uint8_t arrays
With cppyy 2.3.1 and python3.8, I could do the following:
import cppyy
cppyy.cppdef(''' struct T { uint8_t t[10]; }; ''')
t = cppyy.gbl.T()
bytes(t.t)
With cppyy 2.4.0 and above, I get a sigsev:
#8 signal handler called
#9 …
fab
- 55
- 4
2
votes
1 answer
illegal instruction on aws batch
I'm trying to submit a demo job to batch compute that tests if I can properly use a python module "cppyy".
However, I received "illegal instruction" core dump error.
Interestingly, I didn't receive any error message if I run the job at a container…
Max Wong
- 694
- 10
- 18
2
votes
1 answer
Type alias arguments in cppyy
I'm trying to use some C++ libraries in Python code. One issue I've had is I can't seem to call functions that take an aliased type as an argument. Here is a minimal example I've reproduced:
import cppyy
cppyy.cppdef(
"""
using namespace…
Christiaan Swanepoel
- 173
- 4
2
votes
1 answer
Exception at `import cppyy` on macOS Catalina or Big Sur
Pretty simple explanation - I can pip install copy but import cppyy in any python file throws a whole lot of exceptions:
(Re-)building pre-compiled headers (options: -O2 -mavx); this may take a minute ...
ERROR in cling::CIFactory::createCI():…
Chris Vandevelde
- 1,431
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2
votes
1 answer
cppyy inherit class that contains a smart pointer
Here is a simple example of inheriting from a class that contains a smart pointer. We don't do anything with it, just declare it.
import cppyy
cppyy.cppdef("""
class Example {
private:
std::unique_ptr x;
public:
Example()…
innisfree
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2
votes
1 answer
cppyy with std::function) callback
I am using cppyy. I want to pass a function to my C++. The C++ expects a function of signature std::function)>. I don't know how to do it. Here is a minimal example of the error:
import cppyy
# To be passed to C
def…
innisfree
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- 1
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1
vote
0 answers
Unable to install cppyy on Ubuntu — gmake error 2
I'm trying to install cppyy on Ubuntu (arm64) using a Python installation created using pyenv. gcc, g++, build-essential, and make are installed from the default Ubuntu distribution packages.
I have tried two methods to install cppyy, but neither…
Ben Zelnick
- 433
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1
vote
1 answer
How to define in Python a shared pointer to imported virtual class using cppyy
I have a virtual class in my code:
namespace X
{
class Y
{
public:
/* CTOR */
Y() {};
/* DTOR */
virtual ~Y() {};
/* Initialization */
virtual bool Init() = 0;
virtual…
iliya pruzhinin
- 11
- 1
1
vote
1 answer
cppyy OPENMP error: nullptr result where temporary expected
I've been trying to run some parallelised code in C++ from Python through cppyy but am facing an error.
The executable (compilted through GCC with -fopenmp -O2) runs without errors and shows the expected drop in runtime from parallelisation.
When…
Thejasvi
- 200
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