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How do you run your own code alongside Tkinter's event loop?
My little brother is just getting into programming, and for his Science Fair project, he's doing a simulation of a flock of birds in the sky. He's gotten most of his code written, and it works nicely, but the birds need to move every moment .
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What does pylint's “Too few public methods” message mean
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+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...
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.
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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...
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...
What's the difference between process.cwd() vs __dirname?
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Does this mean that process.cwd() is synonym to . for all cases except for require()?
– Alexander Gonchiy
Aug 29 '15 at 9:44
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Is it possible to print a variable's type in standard C++?
For example:
19 Answers
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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
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Worked for me after installing scipy.
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What's the (hidden) cost of Scala's lazy val?
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It looks like the compiler arranges for a class-level bitmap int field to flag multiple lazy fields as initialized (or not) and initializes the target field in a synchronized block if the relevant xor of the bitmap indicates it is necessary.
Using:
class Some...