Mailman 3 October 2014 - Python-ideas

Delegating `BoundArguments.__getitem__` to `BoundArguments.arguments.__getitem__`
by Ram Rachum Oct. 4, 2014

Oct. 4, 2014

Hi, I suggest delegating `BoundArguments.__getitem__` to `BoundArguments.arguments.__getitem__`, so instead of doing `bound_arguments.arguments['foo']` we could do `bound_arguments['foo']`. Since there isn't that much more to a `BoundArguments` object than its arguments I think it's nice to save some typing and be able to access the arguments directly. Thanks, Ram.

3 3

possible extension to how the new StopIteration is handled (python >=3.3)
by Stephan Sahm Oct. 3, 2014

Oct. 3, 2014

Hi all, I just tried the new possibilities in writing generators which were included since python3.3 into the python standard. Concretely, using return 1 in a generator is equal to raise StopIteration(1) Thus the following works: >>> def f(): ... yield 0 ... return 1 >>> g = f() >>> next(g) 0 >>> next(g) Traceback (most recent call last): File "<stdin>", line 1, in <module> StopIteration: 1 however calling next(g) once again gives the following: >>> next(g) Traceback (most recent call last): File "<stdin>", line 1, in <module> StopIteration mind the missing StopIteration: 1 . In my impression this is not like I intuitively think about a generator. If there is a StopIteration Exception connected to a generator, then there should be only ONE such. This is not only theoretical, but would have a real application using such generator in for loops. At the moment the following happens: >>> g = f() >>> for e in g: ... print(e) ... 0 >>> next(g) Traceback (most recent call last): File "<stdin>", line 1, in <module> StopIteration Remind again the missing StopIteration: 1 . If the same StopIteration would be thrown at every call when g is empty, one could actually extract the return value (without using some maybe possible but more complicated return_value = yield from work arrounds). Any feedbacks? Are there others thinking that this would be a straightforward extension to the newly introduced raise StopIteration(return_value) feature? looking forward to your responses, with best wishes, Stephan

3 5

Python 2's re module should take longs
by Ryan Gonzalez Oct. 1, 2014

Oct. 1, 2014

This works: re.search('(abc)', 'abc').group(1) but this doesn't: re.search('(abc)', 'abc').group(1L) The latter raises "IndexError: no such group". Shouldn't that technically work? -- Ryan If anybody ever asks me why I prefer C++ to C, my answer will be simple: "It's becauseslejfp23(@#Q*(E*EIdc-SEGFAULT. Wait, I don't think that was nul-terminated." Personal reality distortion fields are immune to contradictory evidence. - srean Check out my website: http://kirbyfan64.github.io/

9 11