class - Is there a way to pass arguments using the dot operator in python? -

i'd make clean, "smart" method performs specific operations without passing in arguments. have code works in principle follows:

class foo():     def __init__(self, spam='spam', ham='ham'):         self.spam = spam         self.ham = ham      def bar(self, arg):         # spam operation         if arg == self.spam:             return self.spam*2         # ham operation         elif arg == self.ham:             return self.ham*3 

notice bar method written perform different operations on spam , ham. implementing code return:

foo = foo() foo.bar(foo.spam)                      # returns 'spamspam' foo.bar(foo.ham)                       # returns 'hamhamham' 

unfortunately, i'm having use foo twice access specific operation in bar, awkward , tedious. there cleaner, pythonic way same results without passing in arguments? example, possible overload dot (.) operator same results with:

# ideal 1 foo = foo() foo.bar.spam                          # bar knows use spam operation foo.bar.ham                           # bar knows use ham operation     

or better

# ideal 2 foo = foo() foo.spam.bar                          # bar knows use spam operation foo.ham.bar                           # bar knows use ham operation      

edit: updated parametize options.

here using object composition:

class pork(object):     def __init__(self, name, mult):         self.name = name         self.mult = mult      @property     def bar(self):         return self.name * self.mult      def __repr__(self):         return self.name  class foo(object):     def __init__(self, spam='spam', ham='ham'):         self.spam = pork(spam, 2)         self.ham = pork(ham, 3) 

results:

in [638]: foo = foo()  in [639]: foo.spam.bar out[639]: 'spamspam' in [641]: foo.ham.bar out[641]: 'hamhamham'