How to divide the whole number into separate numbers, and bring them through a comma?

If you just need to get it out, then using:

  a =  987    str  (a), sep =  '', ')  #/\ the separator between the elements   #/\ bringing the number to the line   #/\ unpacking the line into separate symbols      
 if the line  '9,8,7'  needs to be saved somewhere, then: 
  
  A =  987  result =  '', ' .join ( str  (a))  ###### "" /\ We bring the number to the line   #/\ We sort out each symbol of the line   #/\ combine through a comma      
  
  
  
  
  
  
  
 , it is also possible Class = "">   print  (result)