Can you write a script which selects all elements of specific type 
(e.g., all Text Elements or all Cell Elements) in the active model?  

from MSPyBentley import *
from MSPyECObjects import *
from MSPyBentleyGeom import *
from MSPyDgnPlatform import *
from MSPyDgnView import *
from MSPyMstnPlatform import *

import tkinter as tk
from tkinter import simpledialog, messagebox

def selectElementsbyType(inputElementType):
    """
    Select elements of a specific type from the active model.

    :param inputElementType: The type of elements to select (int).
    """
    ACTIVEMODEL = ISessionMgr.ActiveDgnModelRef
    dgnModel = ACTIVEMODEL.GetDgnModel()
    graphicalElements = dgnModel.GetGraphicElements()
    selSetManager = SelectionSetManager.GetManager()
    selSetManager.EmptyAll()  # Clear previous selection

    count = 0
    for perElementRef in graphicalElements:
        eh = ElementHandle(perElementRef)
        msElement = EditElementHandle(perElementRef, dgnModel).GetElement()
        isGraphics = msElement.ehdr.isGraphics
        isInvisible = msElement.hdr.dhdr.props.b.invisible
        if isGraphics and not isInvisible:
            eleType = eh.GetElementType()
            if eleType == inputElementType:
                selSetManager.AddElement(perElementRef, dgnModel)
                count += 1

    agenda = ElementAgenda()
    selSetManager.BuildAgenda(agenda)
    messagebox.showinfo("Selection Complete", f"Selected {count} elements of type {inputElementType}.")

# --- UI to prompt for element type ---
def prompt_and_run():
    root = tk.Tk()
    root.withdraw()
    type_str = simpledialog.askstring(
               "Element Type", "Enter element type number (e.g., 17 for Text, 2 for Cell):")
    if type_str is None:
        return
    try:
        inputElementType = int(type_str)
    except ValueError:
        messagebox.showerror("Error", "Invalid element type number.")
        return
    selectElementsbyType(inputElementType)


def main():
    prompt_and_run()


if __name__ == "__main__":
    main()