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Remove empty strings from a list of strings
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If you're that pressed for performance, itertool's ifilter is even faster—>>> timeit('filter(None, str_list)', 'str_list=["a"]*1000', number=100000) 2.3468542098999023; >>> timeit('itertools.ifilter(None, ...
What is the difference between HTTP status code 200 (cache) vs status code 304?
...e other hand, are the response of the server after the browser has checked if a file was modified since the last version it had cached (the answer being "no").
For most optimal web performance, you're best off setting a far-future Expires: or Cache-Control: max-age header for all assets, and then w...
Check if a string contains another string
I want to find if a string contains a ","(comma) in it. Do we have any other option other than reading char-by-char?
4 Answ...
Find a file in python
I have a file that may be in a different place on each user's machine. Is there a way to implement a search for the file? A way that I can pass the file's name and the directory tree to search in?
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Check whether an array is a subset of another
...ly calls the Equals and GetHashCode of the overridden object class methods if there's no IEqualityComparer provided for the job.
– Mrinal Kamboj
Oct 20 '15 at 7:21
2
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What is the difference between print and puts?
For example in this line of code I wrote, print and puts produce different results.
6 Answers
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From ND to 1D arrays
... 3, 4, 5, 6])
Note that ravel() returns a view of a when possible. So modifying b also modifies a. ravel() returns a view when the 1D elements are contiguous in memory, but would return a copy if, for example, a were made from slicing another array using a non-unit step size (e.g. a = x[::2]).
If...
How to dump a table to console?
...on: how do I go about installing an extension like pl.pretty? It's be nice if I could just do something like a gem install without futzing with unrolling tar balls and finding the ideal spot on my HD to situate things. Is there a quick/painless "do-it-this-way"?
– Cliff
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How to drop columns by name in a data frame
I have a large data set and I would like to read specific columns or drop all the others.
11 Answers
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Is there a NumPy function to return the first index of something in an array?
...with first all the row indices, then all the column indices.
For example, if an array is two dimensions and it contained your item at two locations then
array[itemindex[0][0]][itemindex[1][0]]
would be equal to your item and so would
array[itemindex[0][1]][itemindex[1][1]]
numpy.where
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