大约有 46,000 项符合查询结果（耗时：0.0384秒） [XML]
How to run code when a class is subclassed? [duplicate]
...t is to define a subclass of type -- i.e. a metaclass.
A metaclass is to its class as a class is to its instance.
In Python2 you would define the metaclass of a class with
class SuperClass:
__metaclass__ = Watcher
where Watcher is a subclass of type.
In Python3 the syntax has been chang...
Lazy Method for Reading Big File in Python?
I have a very big file 4GB and when I try to read it my computer hangs.
So I want to read it piece by piece and after processing each piece store the processed piece into another file and read next piece.
...
GCC dump preprocessor defines
Is there a way for gcc/g++ to dump its preprocessor defines from the command line?
I mean things like __GNUC__ , __STDC__ , and so on.
...
What does the “yield” keyword do?
What is the use of the yield keyword in Python, and what does it do?
42 Answers
42
...
How can I filter a date of a DateTimeField in Django?
I am trying to filter a DateTimeField comparing with a date. I mean:
14 Answers
14
...
How to refer to relative paths of resources when working with a code repository
We are working with a code repository which is deployed to both Windows and Linux - sometimes in different directories. How should one of the modules inside the project refer to one of the non-Python resources in the project (CSV files, etc.)?
...
Count character occurrences in a string in C++
...
#include <algorithm>
std::string s = "a_b_c";
size_t n = std::count(s.begin(), s.end(), '_');
share
|
improve this answer
|
...
node.js equivalent of python's if __name__ == '__main__' [duplicate]
... method:
When a file is run directly from Node, require.main is set to its module.
To take advantage of this, check if this module is the main module and, if so, call your main code:
var fnName = function() {
// main code
}
if (require.main === module) {
fnName();
}
EDIT: If you us...
Why is Python 3.x's super() magic?
In Python 3.x, super() can be called without arguments:
1 Answer
1
...
“Inner exception” (with traceback) in Python?
...rogramming in Python. When an exception is thrown I typically want to wrap it in another exception that adds more information, while still showing the full stack trace. It's quite easy in C#, but how do I do it in Python?
...