[QUESTION] Import module second time fails with numpy #3112
Description
I use Pybind11 and import module
void test(){
py::scoped_interpreter python{};
try {
py::module pyModule = py::module_::import("example");
//... use module
}
catch (py::error_already_set const &pythonErr) {
std::cout << pythonErr.what();
}
}
example.py
import numpy as np
a = 1
b = a + 1
print(b)
However, when I call the method test second time, it raises the exception:
SystemError: Objects/structseq.c:401: bad argument to internal function
At:
/usr/local/opt/python@3.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/numpy/core/overrides.py(7): <module>
<frozen importlib._bootstrap>(228): _call_with_frames_removed
<frozen importlib._bootstrap_external>(850): exec_module
<frozen importlib._bootstrap>(695): _load_unlocked
<frozen importlib._bootstrap>(986): _find_and_load_unlocked
<frozen importlib._bootstrap>(1007): _find_and_load
<frozen importlib._bootstrap>(228): _call_with_frames_removed
<frozen importlib._bootstrap>(1066): _handle_fromlist
/usr/local/opt/python@3.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/numpy/core/multiarray.py(12): <module>
<frozen importlib._bootstrap>(228): _call_with_frames_removed
<frozen importlib._bootstrap_external>(850): exec_module
<frozen importlib._bootstrap>(695): _load_unlocked
<frozen importlib._bootstrap>(986): _find_and_load_unlocked
<frozen importlib._bootstrap>(1007): _find_and_load
<frozen importlib._bootstrap>(228): _call_with_frames_removed
<frozen importlib._bootstrap>(1066): _handle_fromlist
/usr/local/opt/python@3.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/numpy/core/__init__.py(51): <module>
<frozen importlib._bootstrap>(228): _call_with_frames_removed
<frozen importlib._bootstrap_external>(850): exec_module
<frozen importlib._bootstrap>(695): _load_unlocked
<frozen importlib._bootstrap>(986): _find_and_load_unlocked
<frozen importlib._bootstrap>(1007): _find_and_load
<frozen importlib._bootstrap>(228): _call_with_frames_removed
<frozen importlib._bootstrap>(1066): _handle_fromlist
/usr/local/opt/python@3.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/numpy/__init__.py(150): <module>
<frozen importlib._bootstrap>(228): _call_with_frames_removed
<frozen importlib._bootstrap_external>(850): exec_module
<frozen importlib._bootstrap>(695): _load_unlocked
<frozen importlib._bootstrap>(986): _find_and_load_unlocked
<frozen importlib._bootstrap>(1007): _find_and_load example.py(3): <module>
<frozen importlib._bootstrap>(228): _call_with_frames_removed
<frozen importlib._bootstrap_external>(850): exec_module
<frozen importlib._bootstrap>(695): _load_unlocked
<frozen importlib._bootstrap>(986): _find_and_load_unlocked
<frozen importlib._bootstrap>(1007): _find_and_load
If I remove
import numpy as np
it is working.
I am using MacOS BigSur 11.2.3
Note: This is a simple example where numpy is not used, but in my actual code I want to use it