Even though python import pybind11 module was deleted, keep alive.

[shinkinf]

This may be similar to #4014

Module function is doing push_back one-array by input integer.
It defines this module when importing, explicitly delete it, and then import it as another module.
I expect each module has 1 array, but inner array is kept and grows.

Occurs in the following codes....

[C++(main.cpp)]
#include <pybind11/pybind11.h>

std::vector _array(0);

int CreateArray(int a)
{
_array.push_back(a);
return _array.size();
}

PYBIND11_MODULE(arrayproc, m) {
m.doc() = "pybind11 example";
m.def("CreateArray", &CreateArray, "");
}

[Compile]
g++ -O3 -Wall -shared -std=c++11 -fPIC python3 -m pybind11 --includes main.cpp -o arrayprocpython3-config --extension-suffix

[Python(main.py)]
if name == 'main':
import arrayproc as test1
list1 = test1.CreateArray(5)
del(test1)
import arrayproc as test2
list2 = test2.CreateArray(5)
del(test2)
import arrayproc as test3
list3 = test3.CreateArray(5)

print('Arraylength[list1] =', list1)
print('Arraylength[list2] =', list2)
print('Arraylength[list3] =', list3)

[Result]
Arraylength[list1]= 1
Arraylength[list2]= 2
Arraylength[list3]= 3

How can I avoid this?
Best Regards,