zaur a écrit :
On 28 авг, 16:07, Bruno Desthuilliers <bruno.
42.desthuilli...@websiteburo.invalid> wrote:
zaur a écrit :
On 26 авг, 17:13, "Diez B. Roggisch" <de...@nospam.web.de> wrote:
Whom am we to judge? Sure if you propose this, you have some usecases in
mind - how about you present these
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?
Either 1/write an alternate initializer and bind it to the appropriate
classes or 2/write factory functions:
1/
from foreign_module import Person, Address
def my_init(self, **kw):
for k, v in kw.items():
setattr(self, k, v)
return self
Person.init = my_init
Address.init = my_init
person = Person().init(
name="john",
age=30,
address = Address().init(
street="Green Street",
no=12
)
)
2/
from functools import partial
import foreign_module
def my_factory(cls, **kw):
obj = cls()
for k, v in kw.items():
setattr(obj, k, v)
return obj
Person = partial(my_factory, foreign_module.Person)
Address = partial(my_factory, foreign_module.Address)
person = Person(
name="john",
age=30,
address = Address(
street="Green Street",
no=12
)
)
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