Text Editor Scripts not available in the Python Console - but are available to scaling drivers

Summary - Background

• Created a text drivers.py file in Gedit
• Opened drivers.py in Blender Text Editor
• Selected [x] Register

Summary - Issue

• The scripts are available to my scaling drivers

  • No problem there

• When I try to run a test value in the python console I get the error

  • NameError: name 'driver_Combo' is not defined

Summary - Question

Do I need to do something to make the (external) scripts available in the Python Console ?

Full Details

Just recently started learning Blender.

I am using driver scripted expressions for [ Transform ] [ Scale ] of objects.

I was creating (and testing) scripts in the Python Console:

• all good with achieving my driver scaling
• scripts created in Python Console were not being saved with my .blend

Now I have moved them into the text editor:

• Created a text drivers.py file in Gedit
• Opened drivers.py in Blender Text Editor
• Selected [x] Register

This is the content of drivers.py

import bpy  
from math import degrees, radians  
from math import pi  
from math import sin  

# def function 
def driver_Combo(time):  
   radius = max(abs(sin(radians(time))),abs(sin(radians(time+90))))  
   if time > 360:  
      radius = 0  
   return radius  

# add function to driver_namespace 
bpy.app.driver_namespace['driver_Combo'] = driver_Combo

I'd like to have the scripts available in the Python Console to test values.

How do I make the scripts available ?

Thanks.