大约有 45,000 项符合查询结果（耗时：0.0604秒） [XML]
Chaining multiple filter() in Django, is this a bug?
...
The way I understand it is that they are subtly different by design (and I am certainly open for correction): filter(A, B) will first filter according to A and then subfilter according to B, while filter(A).filter(B) will return a row that matche...
How do I find the location of Python module sources?
...ource by looking at themodule.__file__.
The datetime module, however, is written in C, and therefore datetime.__file__ points to a .so file (there is no datetime.__file__ on Windows), and therefore, you can't see the source.
If you download a python source tarball and extract it, the modules' code ...
Get the current script file name
...Just use the PHP magic constant __FILE__ to get the current filename.
But it seems you want the part without .php. So...
basename(__FILE__, '.php');
A more generic file extension remover would look like this...
function chopExtension($filename) {
return pathinfo($filename, PATHINFO_FILENAM...
How do I flag a method as deprecated in Objective-C 2.0?
...ass
-method __attribute__((deprecated));
@end
or:
#include <AvailabilityMacros.h>
@interface SomeClass
-method DEPRECATED_ATTRIBUTE; // or some other deployment-target-specific macro
@end
share
|
...
Why do some C# lambda expressions compile to static methods?
...e there are no closures, for example:
int age = 25;
Action<string> withClosure = s => Console.WriteLine("My name is {0} and I am {1} years old", s, age);
Action<string> withoutClosure = s => Console.WriteLine("My name is {0}", s);
Console.WriteLine(withClosure.Method.IsStatic);
Co...
How do I create a constant in Python?
...annot declare a variable or value as constant in Python. Just don't change it.
If you are in a class, the equivalent would be:
class Foo(object):
CONST_NAME = "Name"
if not, it is just
CONST_NAME = "Name"
But you might want to have a look at the code snippet Constants in Python by Alex Martell...
PHP array_filter with arguments
...comments on the documentation page. The idea is that you create an object with the desired state ($num) and the callback method (taking $i as an argument):
class LowerThanFilter {
private $num;
function __construct($num) {
$this->num = $num;
}
fu...
how to change any data type into a string in python
...= repr(myvariable) # '4'
This is called "conversion" in python, and is quite common.
share
|
improve this answer
|
follow
|
...
How do I mock an open used in a with statement (using the Mock framework in Python)?
How do I test the following code with unittest.mock :
8 Answers
8
...
Python constructor and default value [duplicate]
...t generally do what you want. Instead, try this:
class Node:
def __init__(self, wordList=None, adjacencyList=None):
if wordList is None:
self.wordList = []
else:
self.wordList = wordList
if adjacencyList is None:
self.adjacencyList ...