globalrev a écrit :
On 16 Maj, 14:19, Bruno Desthuilliers <bruno.
[EMAIL PROTECTED]> wrote:
globalrev a écrit :
(snip)
def getMovies():
return self.movies
4/ Python has support for computed attributes, so you just don't need
these getters.
> when class =
> class customer:
Please, do yourself and the world a favour, follow naming conventions
(not only will this make your code more readable, but also quite a lot
of things in Python rely on conventions).
And really, use newstyle classes unless you have a *very* compelling
reason not to.
class Customer(object):
> def __init__(self, idnbr, movies):
> self.idnbr = idnbr
> self.movies = movies
>
print "cust", cust1.idnbr, cust1.movies()
Why do you want to call a list ???
Traceback (most recent call last):
File "C:\Python25\myPrograms\netflix\netflix.py", line 24, in
<module>
print "cust", cust1.idnbr, cust1.movies()
TypeError: 'list' object is not callable
Indeed. cust1.movie being a list, that's just what you would expect.
Hint : what do you think will happen with the following code:
alist = [1, 2, 3]
alist()
When I say that Python has support for computed attributes, it doesn't
mean it will automagically add getters/setters for your attributes, but
that by default you just *don't need* getters/setters - you'll be able
to transparently add them latter if there's an effective need for them -
where "transparently" means "without client code knowing it's in fact
calling a getter or setter".
Example:
# before:
class Foo(object):
def __init__(self, name):
# just a plain attribute assignment
self.name = name
f = Foo('bruno')
# just a plain attribute access
print f.name
# after
class Foo(object):
def __init__(self, name):
# still looks like a plain attribute assignment
self.name = name
# defining the setter and getter
def _setname(self, name):
print "setting %s name to '%s'" % (self, name)
self._name = name
def _getname(self):
print "retrieving %s name ('%s')" % (self, self._name)
return self._name.upper()
# and making this a computed attribute using the getter and
# setter under the hood
name = property(fget=_getname, fset=_setname)
f = Foo('bruno')
# still looks like a plain attribute access
print f.name
Also, given your recent posts here, I strongly suggest you take some
time doing at least the official tutorial.
HTH
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