大约有 47,000 项符合查询结果（耗时：0.0315秒） [XML]
Python memoising/deferred lookup property decorator
...re a real bottleneck to calculate that first time and only really accessed for special cases. Hence they can also be cached after they've been retrieved from the database (this therefore fits the definition of memoisation where the input is simply "no input").
...
What does pylint's “Too few public methods” message mean
...
+1 for "pylint doesn't know what's best" - use your own judgement but as a rule, if what you need is a "struct", use a dict or namedtuple. Use a class when you want to add some logic to your object (for example, you want stuff t...
Do try/catch blocks hurt performance when exceptions are not thrown?
... block. She and an IT representative suggested this can have effects on performance of the code. In fact, they suggested most of the code should be outside of try/catch blocks, and that only important sections should be checked. The Microsoft employee added and said an upcoming white paper warns aga...
Checking images for similarity with OpenCV
...d decades ago as a means to find picture simmilarities. The idea is that a forest will have a lot of green, and a human face a lot of pink, or whatever. So, if you compare two pictures with forests, you'll get some simmilarity between histograms, because you have a lot of green in both.
Downside: i...
Python __call__ special method practical example
...use this special method, because one can simply create a new method and perform the same operation done in __call__ method and instead of calling the instance, you can call the method.
...
What's the difference between process.cwd() vs __dirname?
...
Does this mean that process.cwd() is synonym to . for all cases except for require()?
– Alexander Gonchiy
Aug 29 '15 at 9:44
11
...
What's a correct and good way to implement __hash__()?
...should probably implement the type in C.
Here's an example of using a key for hash and equality:
class A:
def __key(self):
return (self.attr_a, self.attr_b, self.attr_c)
def __hash__(self):
return hash(self.__key())
def __eq__(self, other):
if isinstance(other...
ImportError in importing from sklearn: cannot import name check_build
...
Worked for me after installing scipy.
share
|
improve this answer
|
follow
|
...
Is it possible to print a variable's type in standard C++?
For example:
19 Answers
19
...
What's the best way to send a signal to all members of a process group?
...the best way to do this using any common scripting languages? I am looking for a simple solution.
33 Answers
...