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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 ...
how to change any data type into a string in python
...= repr(myvariable) # '4'
This is called "conversion" in python, and is quite common.
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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
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Best practice for Django project working directory structure
I know there is actually no single right way. However I've found that it's hard to create a directory structure that works well and remain clean for every developer and administrator. There is some standard structure in most projects on github. But it does not show a way to organize another files an...
How do I filter query objects by date range in Django?
...cts.filter(date__year='2011',
date__month='01')
Edit
As Bernhard Vallant said, if you want a queryset which excludes the specified range ends you should consider his solution, which utilizes gt/lt (greater-than/less-than).
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How can I tell gcc not to inline a function?
...ep such calls from being
optimized away, put
asm ("");
Use it like this:
void __attribute__ ((noinline)) foo()
{
...
}
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No ConcurrentList in .Net 4.0?
...ed to see the new System.Collections.Concurrent namespace in .Net 4.0, quite nice! I've seen ConcurrentDictionary , ConcurrentQueue , ConcurrentStack , ConcurrentBag and BlockingCollection .
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Python class inherits object
Is there any reason for a class declaration to inherit from object ?
6 Answers
6
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C++ Lock-free Hazard Pointer（冒险指针） - C/C++ - 清泛网 - 专注C/C++及内核技术
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struct HazardPointer {
public:
class Holder {
public:
explicit Holder(HazardPointer<T> *pointer) : pointer_(pointer) {}
Holder(const HazardPointer &) = delete;
~Holder() { pointer_->Release(); }
T *get() const { return pointer_->target_.load(std::memory_order_acquire); ...
How to apply a function to two columns of Pandas dataframe
...
Here's an example using apply on the dataframe, which I am calling with axis = 1.
Note the difference is that instead of trying to pass two values to the function f, rewrite the function to accept a pandas Series object, and then index the Series to get the values needed.
In [49]: df
Out[...