What is the use of the "ctypes.py_object" module in Python?

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Jayant Kumar · Accepted Answer

Apologies for the confusion, but there is no separate "ctypes.py_object" module in Python. The "ctypes" module itself provides a built-in type called "py_object" that is used within the module.
The "py_object" type in "ctypes" is a generic ctypes type that represents a Python object. It is primarily used when you need to pass Python objects as arguments to C functions or receive Python objects as return values from C functions when using "ctypes" to interface with C code.
Here's how the "py_object" type is typically used within the "ctypes" module:
Passing Python Objects to C Functions: When calling C functions using "ctypes", if a C function expects a Python object as an argument, you can use the "py_object" type to pass the Python object to the function. For example:
import ctypes # Declare the C function prototype c_function = ctypes.CDLL("mylib.so").my_function c_function.restype = ctypes.py_object # Call the C function and receive the Python object return value my_object = c_function()

Receiving Python Objects from C Functions: When using "ctypes" to call C functions that return Python objects, you can specify the return type as "py_object" to receive the Python object returned by the C function. For example:
import ctypes # Declare the C function prototype c_function = ctypes.CDLL("mylib.so").my_function c_function.argtypes = [ctypes.py_object] # Create a Python object my_object = ... # Call the C function with the Python object as an argument c_function(my_object)

In both cases, the "py_object" type acts as a placeholder for a Python object within the "ctypes" module. It allows for seamless integration between Python and C code, enabling the passing of Python objects between the two domains.
Note that the "py_object" type is specific to the "ctypes" module and does not have a separate module of its own.

What is the use of the "ctypes.py_object" module in Python?

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What is the use of the "ctypes.py_object" module in Python?

Jayant Kumar @jayantkumar314

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