大约有 5,100 项符合查询结果（耗时：0.0243秒） [XML]
How to add leading zeros?
...for creating manual axis tick labels. It works particularly well for wide ranges of numbers.
The scales package has several functions such as percent, date_format and dollar for specialist format types.
share
|
...
Python memoising/deferred lookup property decorator
... @lazyprop
def a(self):
print 'generating "a"'
return range(5)
Interactive session:
>>> t = Test()
>>> t.__dict__
{}
>>> t.a
generating "a"
[0, 1, 2, 3, 4]
>>> t.__dict__
{'_lazy_a': [0, 1, 2, 3, 4]}
>>> t.a
[0, 1, 2, 3, 4]
...
Callback functions in C++
...xample the for_each algorithm applies an unary callback to every item in a range of iterators:
template<class InputIt, class UnaryFunction>
UnaryFunction for_each(InputIt first, InputIt last, UnaryFunction f)
{
for (; first != last; ++first) {
f(*first);
}
return f;
}
which can be...
Possible reasons for timeout when trying to access EC2 instance
... active security
group. In the inbound dialog below, enter 22 in the port range, your local IP/32 in the source field, and leave 'custom tcp rule' in the dropdown.
share
|
improve this answer
...
What is an index in SQL?
....
This makes clustered indexes great for retrieving lots of data based on range based queries since all the data is located next to each other.
Since the clustered index is actually related to how the data is stored, there is only one of them possible per table (although you can cheat to simulate ...
What is the equivalent of the C++ Pair in Java?
... sum up, in my opinion it is better to have a class Position(x,y), a class Range(begin,end) and a class Entry(key,value) rather than a generic Pair(first,second) that doesn't tell me anything about what it's supposed to do.
...
What is the difference between lemmatization vs stemming?
...ng information retrieval over a billion documents with 99% of your queries ranging from 1-3 words, you can settle for stemming.
As for NLTK, the WordNetLemmatizer does use the part of speech, though you have to provide it (otherwise it defaults to nouns). Passing it "dove" and "v" yields "dive" wh...
Convert bytes to a string
...n Codepage Layout - it is where Python chokes with infamous ordinal not in range.
UPDATE 20150604: There are rumors that Python 3 has the surrogateescape error strategy for encoding stuff into binary data without data loss and crashes, but it needs conversion tests, [binary] -> [str] -> [bina...
Display image as grayscale using matplotlib
...en images, this is fine, you won't see a different. But if you have narrow range of pixel value image, say the min pixel is 156 and the max pixel is 234. The gray image will looks totally wrong.
The right way to show an image in gray is
from matplotlib.colors import NoNorm
...
plt.imshow(img,cmap=...
How do you remove a specific revision in the git history?
...4---5 master
After:
1---2---4'---5' master
From git-rebase(1):
A range of commits could also be
removed with rebase. If we have the
following situation:
E---F---G---H---I---J topicA
then the command
git rebase --onto topicA~5 topicA~3 topicA
would result in the removal o...