1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
# Py_REFCNT and _Py_REFCNT are the same, except _Py_REFCNT takes
# a raw pointer and Py_REFCNT takes a normal Python object
from cpython.ref cimport PyObject, _Py_REFCNT, Py_REFCNT
import sys
python_dict = {"abc": 123}
python_dict_refcount = Py_REFCNT(python_dict)
cdef owned_reference(object obj):
refcount1 = Py_REFCNT(obj)
print(f'Inside owned_reference initially: {refcount1}')
another_ref_to_object = obj
refcount2 = Py_REFCNT(obj)
print(f'Inside owned_reference after new ref: {refcount2}')
cdef borrowed_reference(PyObject * obj):
refcount1 = _Py_REFCNT(obj)
print(f'Inside borrowed_reference initially: {refcount1}')
another_ptr_to_object = obj
refcount2 = _Py_REFCNT(obj)
print(f'Inside borrowed_reference after new pointer: {refcount2}')
# Casting to a managed reference to call a cdef function doesn't increase the count
refcount3 = Py_REFCNT(<object>obj)
print(f'Inside borrowed_reference with temporary managed reference: {refcount3}')
# However calling a Python function may depending on the Python version and the number
# of arguments.
print(f'Initial refcount: {python_dict_refcount}')
owned_reference(python_dict)
borrowed_reference(<PyObject *>python_dict)
|
