correct syntax required to add size AND location when using row.operator("mesh.primitive_cube_add")

Question

New to Blender and python, but not programming. I have been following a youtube series which creates a panel in the 3D window. The author was using blender 2.8 and I have 3.3.12.

I want to create a mesh cube at location .5, .5, .5 and with size=1 With the current code as follows, I can only either add size or location but not both. Is there a way to do this?

Here is my current code;

bl_info = {
    "name":  "ObjectAdder",
    "author":  "ezywingman",
    "version":  (1, 0, 0),
    "blender":  (3, 3, 12),
    "location":  "View3d > Add > Mesh > ObjectAdder",
    "description": "Example",
    "warning":  "",
    "doc_url":  "",
    "category":  "Add Mesh",
}
Load the Python language into the system
import bpy
class TestPanel(bpy.types.Panel):
    bl_label       = "ObjectAdder"
    bl_idname      = "PT_TestPanel"
    # set where the panel will reside
    bl_space_type  = 'VIEW_3D'
    # select the region where the panel will reside
    # in this instance 'UI' is the side of the 3D panel
    bl_region_type = 'UI'
    # place in a current tab, or create a new one
    # in this instance it's a new one
    bl_category    = "Object_Creation"
def draw(self, context):
    layout = self.layout
    row    = layout.row()
    row.label(text = "Add an object", icon = 'CUBE')
    row    = layout.row()
    row.operator("mesh.primitive_cube_add", icon='CUBE').location=(.5,.5,.5)
    row    = layout.row()
    row.operator("mesh.primitive_uv_sphere_add", icon='SPHERE').location=(1,1,1)
    row    = layout.row()
    row.operator("object.text_add", icon = 'FILE_FONT', text="Font Button")
    row    = layout.row()


class PanelA(bpy.types.Panel):
    bl_label       = "Scaling"
    bl_idname      = "PT_PanelA"
    bl_space_type  = 'VIEW_3D'
    bl_region_type = 'UI'
    bl_category    = "Object creation"
    bl_parent_id = 'PT_TestPanel'
    bl_options = {'DEFAULT_CLOSED'}
def draw(self, context):
    layout = self.layout
    obj = context.object
    row    = layout.row()
    row.label(text = "Select an option to scale your object", icon = 'FONT_DATA')
    row    = layout.row()
    row.operator("transform.resize")
    col = layout.column() 
    col.prop(obj, "scale")


class PanelB(bpy.types.Panel):
    bl_label       = "Specials"
    bl_idname      = "PT_PanelB"
    bl_space_type  = 'VIEW_3D'
    bl_region_type = 'UI'
    bl_category    = "Object creation"
    bl_parent_id = 'PT_TestPanel'
    bl_options = {'DEFAULT_CLOSED'}
def draw(self, context):
    layout = self.layout
    row    = layout.row()
    row.label(text = "Select a special Option", icon = 'COLOR_BLUE')
    row    = layout.row()                
    row.operator("object.shade_smooth", icon='MOD_SMOOTH', text= "Set Smooth Shading")
    row.operator("object.subdivision_set")
    row    = layout.row()
    row.operator("object.modifier_add")





def register():
    bpy.utils.register_class(TestPanel)
    bpy.utils.register_class(PanelA)
    bpy.utils.register_class(PanelB)
def unregister():
    bpy.utils.unregister_class(TestPanel)
    bpy.utils.unregister_class(PanelA)
    bpy.utils.unregister_class(PanelB)
if name == "main":
    register()

now sorted using this updated part if the code thanks to 'Gorgious'

    def draw(self, context):
        layout = self.layout
        row    = layout.row()
        row.label(text = "Add an object", icon = 'CUBE')
        row    = layout.row()
        op = row.operator("mesh.primitive_cube_add", icon='CUBE')
        op.location=(.5,.5,.5)
        op.size = (1)
        row     = layout.row()

Answer 1

Credit to Gorgious, I re-write part of your code below:

def draw(self, context):
    .... etc
    row    = layout.row()
    op = row.operator("mesh.primitive_cube_add", icon='CUBE')
    op.location=(.5,.5,.5)
    row    = layout.row()
    ... etc

In other words (from the linked solution), operator() returns it's object identity, so you can then use "op.another_method()" to operate on the object stored in variable "op".