大约有 44,000 项符合查询结果（耗时：0.0663秒） [XML]
Peak-finding algorithm for Python/SciPy
... something, but it seems like a common-enough function to be included in standard libraries. Anyone know of one?
8 Answers...
Python Graph Library [closed]
...
There are two excellent choices:
NetworkX
and
igraph
I like NetworkX, but I read good things about igraph as well. I routinely use NetworkX with graphs with 1 million nodes with no problem (it's about double the overhead of a dict of size V + E)
If you want a fe...
How to set default values in Rails?
...ove the default"
end
end
Because ActiveRecord autodiscovers your table and column properties, this will cause the same default to be set in any model using it in any standard Rails app.
However, if you only want default values set in specific cases -- say, it's an inherited model that shares a ...
Count how many records are in a CSV Python?
...r again (to process the rows, say) then you'll need to reset the iterator, and recreate the reader object: file.seek(0) then fileObject = csv.reader(file)
– KevinTydlacka
Jul 12 '18 at 22:05
...
What are the differences between -std=c++11 and -std=gnu++11?
What are the differences between -std=c++11 and -std=gnu++11 as compilation parameter for gcc and clang? Same question with c99 and gnu99 ? I know about C++ and C standards, it's the differences in the parameters that interest me.
...
Guaranteed lifetime of temporary in C++?
...t of any other expression. That is in your case after the function returns and the value is evaluated. So, it will work all nice.
It's in fact what makes expression templates work: They can keep hold references to that sort of temporaries in an expression like
e = a + b * c / d
Because every te...
Numpy: find first index of value fast
... not interested in the following answers because they scan the whole array and don't stop when they find the first occurrence:
...
Version number comparison in Python
I want to write a cmp -like function which compares two version numbers and returns -1 , 0 , or 1 based on their compared valuses.
...
pandas GroupBy columns with NaN (missing) values
...the same placeholder hack).
However, as described in another answer, from pandas 1.1 you have better control over this behavior, NA values are now allowed in the grouper using dropna=False
share
|
i...
Generate random numbers using C++11 random library
As the title suggests, I am trying to figure out a way of generating random numbers using the new C++11 <random> library. I have tried it with this code:
...