Entry

Creating class instances in batch

Mar 4th, 2004 00:07
Martin Miller, Nathan Wallace, Hans Nowak, Snippet 20, Gordon McMillan

"""
Packages: oop
"""

"""
> BUT How to create class instances in batch? I have search the
> documentation but failed to find any clue.
> 
> Here is what I have tried.
> 
> With this list of  [name, age] pairs,  a = [ ['Clinton', 55],
> ['Star', 54], ['Hillary', 53], ........ ] and class
>
>   class Person:
>       def __init__(self, age):
>       self.age = age
> 
> I want to do something like this in effect.
> Clinton = Person(55); Star = Person(54); Hillary = Person(53) ...

Normally, you would define person as
"""

class Person:
    def __init__(self, name, age):
         self.name = name
         self.age = age
    #more stuff

people = []
for (name, age) in [('Clinton', 55), ('Hillary', 53) # (...) etc
]:
   people.append(Person(name, age))

"""
or, perhaps

  people = {}
  for (name, age) in ...:
      people[name] = Person(name, age)

It doesn't make much sense to bind your Person instance to the 
person's name - interactively that helps you remember which instance 
is which, but it really doesn't help in a script. If you put all your 
instances in some kind of container, it'll make them much easier to 
deal with.
"""