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How to convert a PIL Image into a numpy array?
...gt;> pic.putdata(data)
will work but it is very slow.
As of PIL 1.1.6, the "proper" way to convert between images and numpy arrays is simply
>>> pix = numpy.array(pic)
although the resulting array is in a different format than yours (3-d array or rows/columns/rgb in this case).
T...
Pandas aggregate count distinct
... duration user_id
date
2013-04-01 65 2
2013-04-02 45 1
>>> df.groupby("date").agg({"duration": np.sum, "user_id": lambda x: x.nunique()})
duration user_id
date
2013-04-01 65 2
2...
Python: using a recursive algorithm as a generator
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Markus JarderotMarkus Jarderot
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How does lucene index documents?
...obably the best more recent alternative is http://lucene.apache.org/core/3_6_2/fileformats.html
There's an even more recent version at http://lucene.apache.org/core/4_10_2/core/org/apache/lucene/codecs/lucene410/package-summary.html#package_description, but it seems to have less information in it t...
How to detect if app is being built for device or simulator in Swift
...ect iOS on a desktop architecture like follows
#if (arch(i386) || arch(x86_64)) && os(iOS)
...
#endif
After Swift 4.1 version
Latest use, now directly for all in one condition for all types of simulators need to apply only one condition -
#if targetEnvironment(simulator)
// ...
Difference between method and function in Scala
...ration and Definitions (4.2) and Functions Declarations and Definitions (4.6). Chapter 6 (expressions) speaks of Anonymous Functions (6.23) and Method Values (6.7). Curiously, function values is spoken of one time on 3.2.9, and no where else.
A Function Type is (roughly) a type of the form (T1, ......
PHP code to convert a MySQL query to CSV [closed]
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Resharper- Find all unused classes
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ulrichbulrichb
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How to set the thumbnail image on HTML5 video?
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Jason BrooksJason Brooks
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Setting Windows PowerShell environment variables
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