[Tutor] Object defined by initialization parameters

[Bob Gailer]

Andre Engels wrote:
> Is it possible to define a class in such a way, that if twice an
> object is made with the same initialization parameters, the same
> object is returned in both cases?
>   
Use a "factory" function, and store a dictionary of instances as a class 
property:

class myObj(object):
  instances = {}
  def __init__(self,a):
    # the rest of your code 

def makemyObj(a):
  if a in myObj.instances:
    return myObj.instances[a]
  else:
    new_instance =  myObj(a)
    myObj.instances[a] = new_instance 
    return new_instance 
 

[snip]