Python Class only works in %SYS namespace

After running many tests to kick the tires calling Python from COS (which worked fine) in any directory,  I encountered problems when trying to access Python libraries like Numpy from any OTHER namespace.   I saw some other posts about this but the resolution seems unclear.   When I run the test program method numpytest below in %SYS it works just fine.  If i run the Python method in any other namespace I get: 

PITT>do ##class(test.python).numpytest()
DO ##CLASS(test.python).numpytest()
^
<OBJECT DISPATCH> *python object not found

Here is the test program - i did the install with IRISPIP on pandas and numpy and they ran fine.

Class testnp.test Extends %Persistent
{ ClassMethod numpytest() As %String [ Language = python ]
{
# do ##class(testnp.test).numpytest()
 import numpy as np
 import math
 arr = np.array([1, 2, 3, 4, 5]) print(arr) x=np.random.randint(1, 15, 1) #generate a number between 1 and 15
 print("Random num=",x) y=math.pi
 print("This is pi:",y)
 x="hello world"
 print(x)
 a=2+5
 print("a=",a)
}

ClassMethod test() As %String [ Language = python ]
{
import pandas
print("In test python")
 #df = pandas.read_json(json, orient="index")
}

ClassMethod Getdata() As %String
{
   // do ##class(test.python).Getdata()
   // calling Python from COS
   
  set b=##class(%SYS.Python).Import("builtins")
  set d=##class(%SYS.Python).Import("datetime")
  set today=d.date.today()
  write !,today.isoformat()
  set d=##class(%SYS.Python).Import("math")
  write !,d.pi
  set np=##class(%SYS.Python).Import("numpy")
  set a = np.array([3, 4])
  set x= np.exp(4)
  write !,b.float(x)
  
   set rand = np.random.randint(1, 15, 1)
   W !,"rand=",b.int(rand)
        
Quit x
}
 

Any tips or help would be most welcome!