def fun():
    var = 123
    print "Locals: ", locals()
    print "Vars: ", vars()
    print "Globals: ", globals()
fun()

Locals:  {'var': 123}
Globals:  {'__builtins__': <module '__builtin__' (built-in)>, '__name__': '__main__', 'fun': <function fun at 0x00000000
037E3DD8>, '__doc__': None, '__package__': None}

class A():
    def __init__(self, id):
        self.id = id
a = A(1)
print "__dict__: ", a.__dict__
print "vars(a): ", vars(a)

__dict__:  {'id': 1}
vars(a):  {'id': 1}