En Mon, 31 Mar 2008 07:59:13 -0300, sam <[EMAIL PROTECTED]> escribió:
> Steve Holden napisał(a): > >>> 1. You have different syntax for named and unnamed (lambdas) >>> functions. Functions and methods are different things in Python even >>> if they have same syntax. But all these are still a pieces of code >>> that you use repeatedly to make some task. >>> >> A knife and scissors are both used to cut things, but that doesn't mean >> they are the same. > > Well -- sometimes you have to use many, many types of scissors. I don't get the point - weren't you criticizing Python for having many different kind of functions? >> The desire to provide information hiding is fundamentally against the >> Python philosophy, which basically says that attribute values are >> exposed for all to see. This avoids the nonsense of having to provide >> setter and getter methods which Java imposes on the programmer. > > This philosophy is great and makes Python such a good language. But you > can't go > beyond what programmers need. If you do so, then you will have to > implement > tricks as __id. The __id "trick" is not for hidding instance attributes, but to avoid name collisions. Unlike other languages, all instance attributes share a single namespace, you can't qualify a reference to say "the foo attribute from this base class, not this other foo": it is always "the foo attribute" no matter inside which class it was assigned. The __ prefix creates mangled names so __foo used inside a certain class is a different attribute name than __foo outside that class. It is not used to "hide" the attribute, the rules for the mangled name are very easy to emulate. What are those programmers needs? -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
