Benjamin Peterson schrieb:

Good idea. Perhaps eventually they could be extended to Python, but they are definitely useful in C now. How about passing a list of getsets to PyImport_InitModule(5)?

Yeah, I've a similar idea with PyImport_InitModule5() and a list of structs containing name, getter, setter, deleter, docstring. The module struct has to gain an additional slot which may contain a dict of names -> propertyobjects. Christian

Guido van Rossum schrieb:

But wouldn't this mean that those properties would no longer be available in the module's __dict__?

Correct. Module properties would behave exactly like instance properties. They don't appear on the instance's __dict__ attribute, too. By the way I was astonished that the vars() function dones't show properties but dir() does list them.

...

...

class Example(object): ... @property ... def x(self): ... return 42 ... example = Example() example.__dict__ {} vars(example) {} dir(example) ['__class__', '__delattr__', '__dict__', '__doc__', '__getattribute__', '__hash__', '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__str__', '__weakref__', 'x']

Christian

Guido van Rossum schrieb:

On Thu, May 1, 2008 at 12:32 PM, Christian Heimes <lists@cheimes.de> wrote:

...

Guido van Rossum schrieb:

...

But wouldn't this mean that those properties would no longer be available in the module's __dict__?

Correct. Module properties would behave exactly like instance properties. They don't appear on the instance's __dict__ attribute, too.

By the way I was astonished that the vars() function dones't show properties but dir() does list them.

"Astonished" sounds stronger than you probably meant it. :-)

Slightly :) What's your opinion on the module properties idea? Do you still like it although the property values won't show up in __dict__? Christian

Guido van Rossum schrieb:

I don't see how it could work if any Python code is executed in the module, since code execution uses a dict for globals.

Supporting it only for built-in modules seems too big an exception.

I came up with the idea in order to replace the setters and getters of builtin modules such as the sys module. I deliberately excluded Python modules from the idea. It's going to be too tricky to expose the API to Python. Christian

Benjamin Peterson schrieb:

Good idea. Perhaps eventually they could be extended to Python, but they are definitely useful in C now. How about passing a list of getsets to PyImport_InitModule(5)?

Yeah, I've a similar idea with PyImport_InitModule5() and a list of structs containing name, getter, setter, deleter, docstring. The module struct has to gain an additional slot which may contain a dict of names -> propertyobjects. Christian

Guido van Rossum schrieb:

But wouldn't this mean that those properties would no longer be available in the module's __dict__?

Correct. Module properties would behave exactly like instance properties. They don't appear on the instance's __dict__ attribute, too. By the way I was astonished that the vars() function dones't show properties but dir() does list them.

...

...

class Example(object): ... @property ... def x(self): ... return 42 ... example = Example() example.__dict__ {} vars(example) {} dir(example) ['__class__', '__delattr__', '__dict__', '__doc__', '__getattribute__', '__hash__', '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__str__', '__weakref__', 'x']

Christian

Guido van Rossum schrieb:

On Thu, May 1, 2008 at 12:32 PM, Christian Heimes <lists@cheimes.de> wrote:

...

Guido van Rossum schrieb:

...

But wouldn't this mean that those properties would no longer be available in the module's __dict__?

Correct. Module properties would behave exactly like instance properties. They don't appear on the instance's __dict__ attribute, too.

By the way I was astonished that the vars() function dones't show properties but dir() does list them.

"Astonished" sounds stronger than you probably meant it. :-)

Slightly :) What's your opinion on the module properties idea? Do you still like it although the property values won't show up in __dict__? Christian

Guido van Rossum schrieb:

I don't see how it could work if any Python code is executed in the module, since code execution uses a dict for globals.

Supporting it only for built-in modules seems too big an exception.

I came up with the idea in order to replace the setters and getters of builtin modules such as the sys module. I deliberately excluded Python modules from the idea. It's going to be too tricky to expose the API to Python. Christian