[stdlib] Rename py_object to py_object_ptr

[jjvraw]

Apologies if this needs discussion. However, while working in these files, It seems odd to have an attribute of PythonObject named python_object that stores a PyObjectPtr.

struct PythonObject(...):
    var py_object: PyObjectPtr # rename py_object_ptr
    
...
 
     fn unsafe_as_py_object_ptr(self) -> PyObjectPtr:
        """Get the underlying PyObject pointer.

        Returns:
            The underlying PyObject pointer.

        Safety:
            Use-after-free: The caller must take care that `self` outlives the
            usage of the pointer returned by this function.
        """
        return self.py_object

This will cause conflicts with

• [stdlib] Mojo-Python slice interoperability #3549

[jjvraw]

Also, might be beneficial to rename unsafe_as_py_object_ptr to unsafe_py_object_ptr for consistency. Happy to add that in here as well.

[JoeLoser]

@ConnorGray curious to get your thoughts and eyes here.

[ConnorGray]

Also, might be beneficial to rename unsafe_as_py_object_ptr to unsafe_py_object_ptr for consistency. Happy to add that in here as well.

+1 to this, that function isn't used widely so happy to see that small cleanup here as well :)

[JoeLoser]

I'll defer to @ConnorGray on the final call here, but I'll sync this in regardless. Thanks!

[JoeLoser]

!sync

[jjvraw]

Ola :) Gentle reminder @ConnorGray, if this is still wanted.

Apologies for the delayed rebase. End of uni semester had my attention.