Cells succesfully running in Notebook but actions not visible in the ArcGIS Pro Layout

[Sahaja]

I have been trying to automate the map production in ArcGIS Pro 2.9.1 

There is a point in the production where it has to turn on and off some of the elements in the layout and I figured how to do it as well. 

this is the code I'm using:

am_lyt=lyt.listElements(wildcard="Name_of_the_table")[0]
print(am_lyt.visible)
am_lyt.visible=True
print(am_lyt.visible)

This gives the result:

False
True

But the table is not turning on and there's no error either. Surpisingly, when I executed the below code, I could see the action on the layout, its just the visibility not working

mf.camera.setExtent(mf.getLayerExtent(sitelyr, False, True))
print ("x")

I tried using the CIM:

cim_lyt=lyt.getCIM() 

but this line of code is not executing, so I tried the below:

cim_lyt=lyt.getDefinition('V2')

Sadly getDefinition kept giving me it has to attribute error. 

Does anyone know how to resolve this? 

[JohannesLindner]

Hmmm... This code works for me. No matter if the layout is opened or not, no matter the element (eg north arrow works too), and no matter whether I execute in a notebook or in the Python Window.

lyt = arcpy.mp.ArcGISProject("current").listLayouts()[0]
print(f"Layout name: {lyt.name}")

e = lyt.listElements(wildcard="Table Frame")[0]
print(f"Element name: {e.name}")

print(f"{e.name} is visible: {e.visible}")
e.visible = not e.visible
print(f"{e.name} is visible: {e.visible}")

cim = lyt.getDefinition("V2")
print(f"CIM: {cim}")

Element name: Table Frame
Table Frame is visible: False
Table Frame is visible: True
CIM: <arcpy.cim.CIMLayout.CIMLayout object at 0x00000265A2EA4CC8>

Are you sure you're manipulating the correct layout?

Can you share the whole code?

[Sahaja]

Thank you for waiting. I believe I'm manipulating the correct layout. Here's the code: 

import arcpy
import pandas as pd
import os

abspath=os.path.abspath
abspath=os.path.abspath("__file__")
dname=os.path.dirname(abspath)
os.chdir(dname)
ProjectFolder=dname
print(dname)
arcpy.env.workspace=ProjectFolder

project=ProjectFolder +"\ContamCertificates.aprx"
aprx=arcpy.mp.ArcGISProject(project)

mapName= "Map"
layoutName="CTXX"
site= "siteboundary"
m=aprx.listMaps(mapName)[0]
sitelyr=m.listLayers(site)[0]
lyt=aprx.listLayouts(layoutName)[0]
mf = lyt.listElements("mapframe_element", "Map")[0]

mf.camera.setExtent(mf.getLayerExtent(sitelyr, False, True))
print ("x")

arcpy.env.overwriteOutput = True

NSW_CLR_STATUS_IN_Current = "NSW_CLR_STATUS_IN_Current"
siteboundary = "siteboundary"

# Process: Select Layer By Location (Select Layer By Location) (management)
NSW_CLR_STATUS_IN_Current, Output_Layer_Names, Count = arcpy.management.SelectLayerByLocation(in_layer=[NSW_CLR_STATUS_IN_Current], overlap_type="INTERSECT", select_features=siteboundary, search_distance="500 Meters", selection_type="NEW_SELECTION", invert_spatial_relationship="NOT_INVERT")

print (arcpy.GetCount_management(NSW_CLR_STATUS_IN_Current))

if arcpy.GetCount_management(NSW_CLR_STATUS_IN_Current) != 0:
    print("the site is medium risk")
    #Results = lyt.listElements("GRAPHIC_ELEMENT", "Results")[0]
    #Print(results)
    rslt_within500=lyt.listElements("TEXT_ELEMENT", "Note_within_500m")[0]
    rslt_within500.visible=True
    print(rslt_within500.visible)

am_lyt=lyt.listElements(wildcard="Name_of_the_table")[0]
print (am_lyt.visible)
am_lyt.visible=True
print(am_lyt.visible)

fn = ProjectFolder+"\ContaminationCertificate.pdf"
lyt.exportToPDF(fn)

I tried your style 

am_lyt.visible = not am_lyt.visible

This isn't working either. 

Thank you for looking at this

[Sahaja]

Funny enough, I tried running the same code as a python script and the visibility feature works but not the zoom to the feature extents, in fact, it zooms out to the entire world with this line

mf.camera.setExtent(mf.getLayerExtent(sitelyr, False, True))