大约有 11,400 项符合查询结果（耗时：0.0549秒） [XML]
How to mock an import
Module A includes import B at its top. However under test conditions I'd like to mock B in A (mock A.B ) and completely refrain from importing B .
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Why doesn't Dijkstra's algorithm work for negative weight edges?
Can somebody tell me why Dijkstra's algorithm for single source shortest path assumes that the edges must be non-negative.
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How to avoid circular imports in Python? [duplicate]
I know the issue of circular imports in python has come up many times before and I have read these discussions. The comment that is made repeatedly in these discussions is that a circular import is a sign of a bad design and the code should be reorganised to avoid the circular import.
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What does asterisk * mean in Python? [duplicate]
...ng in Python as it does in C? I saw a function like this in the Python Cookbook:
5 Answers
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How to convert string representation of list to a list?
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>>> import ast
>>> x = u'[ "A","B","C" , " D"]'
>>> x = ast.literal_eval(x)
>>> x
['A', 'B', 'C', ' D']
>>> x = [n.strip() for n in x]
>>> x
['A', 'B', 'C', 'D']
ast.literal_eval:
With ast.literal_eval, you can safe...
How can I check if multiplying two numbers in Java will cause an overflow?
I want to handle the special case where multiplying two numbers together causes an overflow. The code looks something like this:
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How to get all possible combinations of a list’s elements?
I have a list with 15 numbers in, and I need to write some code that produces all 32,768 combinations of those numbers.
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Why does the Scala compiler disallow overloaded methods with default arguments?
While there might be valid cases where such method overloadings could become ambiguous, why does the compiler disallow code which is neither ambiguous at compile time nor at run time?
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Split comma-separated strings in a column into separate rows
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This old question frequently is being used as dupe target (tagged with r-faq). As of today, it has been answered three times offering 6 different approaches but is lacking a benchmark as guidance which of the approaches is the fastest1.
The benchmarked so...
What are the most interesting equivalences arising from the Curry-Howard Isomorphism?
...somorphism relatively late in my programming life, and perhaps this contributes to my being utterly fascinated by it. It implies that for every programming concept there exists a precise analogue in formal logic, and vice versa. Here's a "basic" list of such analogies, off the top of my head:
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