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I am building a Rust dynamic library embedding Python using rust-numpy. My project allows me to build a pure Rust binary, a C binary loading the Rust library and a Dotnet binary loading the Rust library. All three scenarios works on Windows but fails on Linux with "Error importing numpy".
The following code built as a cdylib is enough to reproduce the problem when imported into a Dotnet SDK 6.0 or 7.0 program
use numpy::{pyo3::{Python,self},PyArray};#[no_mangle]pubextern"C"fnhello_world(){// Demonstrates the DLL alone is compatible with Dotnet AnyCPUprintln!("Hello, world!");// Demonstrates the ORT DLL is compatible with Dotnet AnyCPUprintln!("Using ort::LoggingLevel::Info : {:?}", ort::LoggingLevel::Info);// Demonstrates the Numpy crate is compatible with Dotnet (only uses ndarray though)println!("Using numpy::array![1, 2] {:?}", numpy::array![1, 2]);// Demonstrates the Numpy crate using actual Python code (numpy array) => fails
pyo3::prepare_freethreaded_python();Python::with_gil(|py| {let slice = &[1,2,3,4,5];let pyarray = PyArray::from_slice(py, slice);println!("Using numpy::array::Pyarray {:?}", pyarray);});}
On Windows, the code succeeds
PS C:\Users\****\workspace\demo-rs> .\dotnet\demo_dotnet\bin\Debug\net6.0\demo_dotnet.exe
Starting C# code
Hello, world!
Using ort::LoggingLevel::Info : Info
Using numpy::array![1, 2] [1, 2], shape=[2], strides=[1], layout=CFcf (0xf), const ndim=1
Using nump::array::Pyarray array([1, 2, 3, 4, 5])
On Ubuntu, the code fails
****:~/workspace/demo-rs/dotnet/demo_dotnet/bin/Debug/net7.0$ LD_LIBRARY_PATH=. ./demo_dotnet
Starting C# code
Hello, world!
Using ort::LoggingLevel::Info : Info
Using numpy::array![1, 2] [1, 2], shape=[2], strides=[1], layout=CFcf (0xf), const ndim=1
thread '<unnamed>' panicked at 'Failed to access NumPy array API capsule: PyErr { type: <class 'ImportError'>, value: ImportError('Error importing numpy: you should not try to import numpy from\n its source directory; please exit the numpy source tree, and relaunch\n your python interpreter from there.'), traceback: Some(<traceback object at 0x7f47853a5900>) }', /home/****/.cargo/registry/src/index.crates.io-6f17d22bba15001f/numpy-0.20.0/src/npyffi/array.rs:52:14
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
fatal runtime error: failed to initiate panic, error 5
Aborted
The error triggers on import of numpy whether we use Rust PyArray or do a import numpy in Python. Removing references to numpy allows to execute Python code with success. For instance, I can print some informations from within Dotnet > Rust > Python as follows :
Numpy was installed using pip3, but I don't think it has anything to do with my Python setup since the dynamic library works when tested from a C code. It seems the error message may be giving a false indication as to the real cause of the error.
Any help would be greatly appreciated!
The text was updated successfully, but these errors were encountered:
Uff, if this is specific to embedding into a .NET binary, then I cannot really add anything. Personally, I would start grepping the NumPy source tree for that error message to understand why NumPy thinks that it was loading from its source tree.
Hi,
I am building a Rust dynamic library embedding Python using rust-numpy. My project allows me to build a pure Rust binary, a C binary loading the Rust library and a Dotnet binary loading the Rust library. All three scenarios works on Windows but fails on Linux with "Error importing numpy".
The following code built as a cdylib is enough to reproduce the problem when imported into a Dotnet SDK 6.0 or 7.0 program
On Windows, the code succeeds
On Ubuntu, the code fails
The error triggers on import of numpy whether we use Rust PyArray or do a import numpy in Python. Removing references to numpy allows to execute Python code with success. For instance, I can print some informations from within Dotnet > Rust > Python as follows :
Numpy was installed using pip3, but I don't think it has anything to do with my Python setup since the dynamic library works when tested from a C code. It seems the error message may be giving a false indication as to the real cause of the error.
Any help would be greatly appreciated!
The text was updated successfully, but these errors were encountered: