On 29 авг, 08:37, "Gabriel Genellina" <gagsl-...@yahoo.com.ar> wrote: > En Fri, 28 Aug 2009 15:25:55 -0300, zaur <szp...@gmail.com> escribió: > > > > > On 28 авг, 16:07, Bruno Desthuilliers <bruno. > > 42.desthuilli...@websiteburo.invalid> wrote: > >> zaur a écrit : > > >> > Ok. Here is a use case: object initialization. > > >> > For example, > > >> > person = Person(): > >> > name = "john" > >> > age = 30 > >> > address = Address(): > >> > street = "Green Street" > >> > no = 12 > > >> > vs. > > >> > person = Person() > >> > person.name = "john" > >> > person.age = 30 > >> > address = person.address = Address() > >> > address.street = "Green Street" > >> > address.no = 12 > > >> Err... Looks like you really should read the FineManual(tm) - > >> specifically, the parts on the __init__ method. > > >> class Person(object): > >> def __init__(self, name, age, address): > >> self.name = name > >> self.age = age > >> self.address = address > > >> class Address(object): > >> def __init__(self, street, no): > >> self.no = no > >> self.street = street > > >> person = Person( > >> name="john", > >> age=30, > >> address = Address( > >> street="Green Street", > >> no=12 > >> ) > >> ) > > > What are you doing if 1) classes Person and Address imported from > > foreign module 2) __init__ method is not defined as you want? > > Welcome to dynamic languages! It doesn't matter *where* the class was > defined. You may add new attributes to the instance (even methods to the > class) at any time. > > 1) > person = Person() > vars(person).update(name="john",age=30,address=Address()) > vars(person.Address).update(street="Green Street",no=12) > > 2) > def the_initializer_i_would_like(person, name, age): > person.name = name > person.age = age > > person = Person() > the_initializer_i_would_like(person, name="john", age=30) > > 3) > def the_initializer_i_would_like(self, name, age): > self.name = name > self.age = age > > Person.init = the_initializer_i_would_like > person = Person() > person.init(name="john", age=30) > > 4) > def a_generic_updater(obj, **kw): > try: ns = vars(obj) > except Exception: ns = None > if ns is not None: > ns.update(kw) > else: > for name in kw: > setattr(obj, name, kw[name]) > > person = Person() > a_generic_updater(person, name="john", age=30) > > -- > Gabriel Genellina
I know about these ways of object initializing. What I said is about using object's dictionary as nested scope in code block. Object initialization is just one use case. So we say about different things. -- http://mail.python.org/mailman/listinfo/python-list
