import cPickle as pickle
from random import random as rand

class Foo(object):
    def __init__(self, a, b):
        self.a = a
        self.b = b
        
    def bar(self):
        return (self.a, self.b)

     
l = []
for i in xrange(10):
    l.append(FooBaz(rand(), rand()))

FILE = open ('list_of_foos.pkl', 'wb')
pickle.dump(l, FILE, pickle.HIGHEST_PROTOCOL)
FILE.close()