Best posts made by noseman

Replying to my own question. We need to define it using

mo.GeGetMoDataSelection(Tag)

Code that works.

import c4d
from c4d.modules import mograph as mo

def main():
    Cloner =  op.GetObject()
    md = mo.GeGetMoData(Cloner)
    AllTags = Cloner.GetTags()
    
    for Tag in AllTags:

        if Tag.GetType() == c4d.Tmgselection:
            print Tag
            SelTag = mo.GeGetMoDataSelection(Tag) #This is the new line
            print SelTag.GetCount()

I always wanted to be able to convert Scripts to Plugins but didn't know how. Thanks to some great people, here is the bare minimum code required to make a Cinema 4D Python Plugin.
Save this as a .pyp file, and put it in a folder in the Plugins. It should appear in the Extensions menu.
Mind you, this ONLY functions like a Script, click-run-done. No UI, no Attributes, nothing...

There's a ton of other stuff you can read here:
https://developers.maxon.net/docs/Cinema4DPythonSDK/html/misc/pluginstructure.html

import c4d
from c4d import gui

class HelloWorldCommand(c4d.plugins.CommandData):
    def Execute(self, doc):

        #Put your executable Code here...
        c4d.gui.MessageDialog("Hello World!")

        return True

if __name__ == "__main__":
    c4d.plugins.RegisterCommandPlugin(
        id=1059500, #Get Unique ID from https://plugincafe.maxon.net/c4dpluginid_cp
        str="HelloWorld",
        info=0,
        dat=HelloWorldCommand(),
        help="put some Help test here...",
        icon=c4d.bitmaps.InitResourceBitmap(5126)
        )