As someone who really struggled with Python and the Blender API a year or so ago, these videos are a life saver! I love your way of teaching. It's very clear and easy to understand :)

I am following along verbatim, step-by-step, but the monkey_grid.py is not registering, where I cannot find it in F3 menu.  In addition, when I save the file, close out, and restart blender, the monkey_grid is not found in bpy.ops.mesh nor F3 menu.  I am working with Blender 2.9.1.  Is there an update to 2.9.1 which can potentially be prevent the scripts from registering? Or, could a step be missing from the video?  Thank you in advance for your help.

Very clear, very informative! Thanks a lot Sybren!

Nice tutorial. I have a question: I want to add Suzzannes along the Z axis as well.

I came up with the following code:

count_z: bpy.props.IntProperty( name="Z", description="Number of Suzannes in the Z-direction", default=3, min=1, soft_max=10 )

def execute(self, context): for idx in range(self.count_x * self.count_y * self.count_z): x = idx % self.count_x y = idx // self.count_x z = idx // self.count_x bpy.ops.mesh.primitive_monkey_add( size=0.2, location=(x, y, z) ) This line is not producing the correct output:

z = idx // self.count_x

I will continue to experiment on my own, but I wanted to know what operation I need to use here.

Thanks again Sybren for this tutorial!

Thanx :)

Finding this whole series incredibly helpful. @Sybren A. Stüvel, you are a gifted instructor. I really appreciate how you referred back to the earlier video in this one to help solidify our understanding without introducing too many new chunks of code at once.

Great Tutorial! I'm new to programing language trying to understand how everything works. As you said there are many ingredients in the operator script, the Identifier, the label, the executer, registration, etc. And the main idea of creating an operator through scripting is to create a class include all ingredients.But it’s very difficult when I try to do it myself, made many mistakes. I find out that the def registration block, the def unregistration block and the if idiom has no indent as the class(the script won’t work with them indented). Does it mean that they are not parts of the class? and only the identifier, label, description, executor, the invoke, and the modal should be included inside the class? If that's true, then the script only have (primarily) 2 parts, the class(indicating what this operator does) and the other parts(indicating what and how blender should do with this class above), so when we click run button, the only code being executed is resister(),and only when we click the operator button in UI(/ hit enter in the blender console) would the class block actually be run? And if there is anything  wrong inside the class block, we won’t able to fin out until then?

HI! I have the blender 2.82 and the operator monkey_grid doesnt appears in f3 and console menu. I need to save the script in a special place?

Thanks for this tuto. Could you provide more? I am especially interested in modal operators. Sometimes modal methods are combined with execute, others only invoke. For reasons I don't understand every tuto I found is about creating menus and buttons, but basic tools (e.g. transform ) running modal for good reason. I feel quite lost about this topic and I am surely not the only one.

On blender 3.0, i am having difficulty getting  the operator to register. It gives me a  console error telling me that the name is incorrect.

I have a simple code like this

import bpy class MESH_OT_pewTest(bpy.types.Operator):     """Do Something"""     bl_idname = "mesh.pewTest"     bl_label = "pew testing"          def execute(self,context):         print("pew")                  return{'FINISHED'}

def register():     bpy.utils.register_class(MESH_ODN_Connect) def unregister():     bpy.utils.unregister_class(MESH_ODN_Connect)

if name=='main':     register()