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Relationship between SciPy and NumPy

SciPy appears to provide most (but not all [1]) of NumPy's functions in its own namespace. In other words, if there's a function named numpy.foo , there's almost certainly a scipy.foo . Most of the time, the two appear to be exactly the same, oftentimes even pointing to the same function object. ...
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How to get a complete list of object's methods and attributes?

...butes, the short answer is: no. The problem is that the attributes are actually defined as the arguments accepted by the getattr built-in function. As the user can reimplement __getattr__, suddenly allowing any kind of attribute, there is no possible generic way to generate that list. The dir functi...
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How to create the most compact mapping n → isprime(n) up to a limit N?

Naturally, for bool isprime(number) there would be a data structure I could query. I define the best algorithm , to be the algorithm that produces a data structure with lowest memory consumption for the range (1, N], where N is a constant. Just an example of what I am looking for: I could rep...
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A simple explanation of Naive Bayes Classification

... & part two being the confusion surrounding Training set. In general all of Machine Learning Algorithms need to be trained for supervised learning tasks like classification, prediction etc. or for unsupervised learning tasks like clustering. During the training step, the algorithms are taught...
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What are inline namespaces for?

C++11 allows inline namespace s, all members of which are also automatically in the enclosing namespace . I cannot think of any useful application of this -- can somebody please give a brief, succinct example of a situation where an inline namespace is needed and where it is the most idiomatic s...
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What do all of Scala's symbolic operators mean?

...se of teaching, into four categories: Keywords/reserved symbols Automatically imported methods Common methods Syntactic sugars/composition It is fortunate, then, that most categories are represented in the question: -> // Automatically imported method ||= // Syntactic sugar ++= // Syn...
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C++ mark as deprecated

...erface that I want to deprecate with portable C++. When I Googled for this all I got was a Microsoft specific solution; #pragma deprecated and __declspec(deprecated) . ...
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Underscore vs Double underscore with variables and methods [duplicate]

... Explanation: People coming from a C++/Java background are especially prone to overusing/misusing this "feature". But __private names don't work the same way as in Java or C++. They just trigger a name mangling whose purpose is to prevent accidental namespace collisions in subclasses...
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How do I perform the SQL Join equivalent in MongoDB?

...rect. The new $lookup operator added to the aggregation pipeline is essentially identical to a left outer join: https://docs.mongodb.org/master/reference/operator/aggregation/lookup/#pipe._S_lookup From the docs: { $lookup: { from: <collection to join>, localField: &lt...
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How to implement __iter__(self) for a container object (Python)

... I normally would use a generator function. Each time you use a yield statement, it will add an item to the sequence. The following will create an iterator that yields five, and then every item in some_list. def __iter__(self): ...