大约有 44,000 项符合查询结果（耗时：0.0312秒） [XML]
Python extending with - using super() Python 3 vs Python 2
...
To clarify a point, I get TypeError: super() takes at least 1 argument (0 given) when trying to call super(self.__class__) in Python 2. (Which doesn't make a lot of sense, but it demonstrates how much information is missing from this answer.)
– jpmc26
...
What's wrong with nullable columns in composite primary keys?
...features are required. otoh, the web design crowd doesn't care. I would at least add a note of caution about this instead of making it sound like a good design idea.
– zxq9
Feb 17 '15 at 11:55
...
List all the modules that are part of a python package?
...not part of the "public" interface and are subject to change.
However, at least as of Python 2.6 (and perhaps earlier versions?)
pkgutil comes with a walk_packages method which recursively walks through all the
modules available.
...
Why aren't programs written in Assembly more often? [closed]
...me available for the platforms I was addressing, and immediately became at least 10x more productive. Most good programmers use the tools they use for rational reasons.
share
...
Mapping two integers to one, in a unique and deterministic way
...ible, so by the obvious Pigeonhole Principle, we need an output of size at least 2^16 * (2^16 -1), which is equal to 2^32 - 2^16, or in other words, a map of 32 bit numbers should be feasible ideally. This may not be of little practical importance in programming world.
Cantor pairing function:
(a...
Ternary operator is twice as slow as an if-else block?
...read everywhere that ternary operator is supposed to be faster than, or at least the same as, its equivalent if - else block.
...
How to recover stashed uncommitted changes
...hat if you're doing more-advanced or more-complicated stuff?
There are at least three or four different "ways to use git stash", as it were. The above is for "way 1", the "easy way":
You started with a clean branch, were working on some changes, and then realized you were doing them in the wrong...
How do I find Waldo with Mathematica?
... in each image.
Obtaining enough training examples. SVMs work best with at least 100 examples of each class. Commercial applications of boosting (e.g., the face-focusing in digital cameras) are trained on millions of positive and negative examples.
A quick Google image search turns up some good da...
What's the pythonic way to use getters and setters?
...utes.
This is what is expected by users of Python. Following the rule of least-surprise, you should try to give your users what they expect unless you have a very compelling reason to the contrary.
Demonstration
For example, say we needed our object's protected attribute to be an integer between...
PATH issue with pytest 'ImportError: No module named YadaYadaYada'
...I'm pretty sure you can't import from random, absolute paths locations, at least using the default "import" mechanism.
– Apteryx
Nov 7 '16 at 18:37
4
...