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fatal error: Python.h: No such file or directory
I am trying to build a shared library using a C extension file but first I have to generate the output file using the command below:
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How to optimize for-comprehensions and loops in Scala?
...he problem in this particular case is that you return from within the for-expression. That in turn gets translated into a throw of a NonLocalReturnException, which is caught at the enclosing method. The optimizer can eliminate the foreach but cannot yet eliminate the throw/catch. And throw/catch is ...
Can't install PIL after Mac OS X 10.9
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Following worked for me:
ln -s /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers/X11 /usr/local/include/X11
sudo pip install pil
UPDATE:
But there is more cor...
Get operating system info
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The code below could explain in its own right, how http://thismachine.info/ is able to show which operating system someone is using.
What it does is that, it sniffs your core operating system model, for example windows nt 5.1 as my own.
It then ...
#define macro for debug printing in C?
... you use a C89 compiler
If you are stuck with C89 and no useful compiler extension, then there isn't a particularly clean way to handle it. The technique I used to use was:
#define TRACE(x) do { if (DEBUG) dbg_printf x; } while (0)
And then, in the code, write:
TRACE(("message %d\n", var));
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How to determine whether a Pandas Column contains a particular value
...n a Pandas column that has a particular value. I tried to do this with if x in df['id'] . I thought this was working, except when I fed it a value that I knew was not in the column 43 in df['id'] it still returned True . When I subset to a data frame only containing entries matching the missing ...
What is the most efficient string concatenation method in python?
...is worth remembering also that this is an old article and it predates the existence of things like ''.join (although I guess string.joinfields is more-or-less the same)
On the strength of that, the array module may be fastest if you can shoehorn your problem into it. But ''.join is probably fast e...
psycopg2: insert multiple rows with one query
...ltiple rows with one query (number of rows is not constant), so I need to execute query like this one:
15 Answers
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How to tell whether a point is to the right or left side of a line
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Use the sign of the determinant of vectors (AB,AM), where M(X,Y) is the query point:
position = sign((Bx - Ax) * (Y - Ay) - (By - Ay) * (X - Ax))
It is 0 on the line, and +1 on one side, -1 on the other side.
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How to put a unicode character in XAML?
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Since XAML is an XML file format you could try the XML character escape. So instead of writing &\u2014, you could write — instead.
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