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What is that “total” in the very first line after ls -l? [closed]
...he files with a line
`total BLOCKS', where BLOCKS is the total disk allocation for all
files in that directory.
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How to overcome TypeError: unhashable type: 'list'
...used to compare dictionary keys during a dictionary lookup quickly.
Internally, hash() method calls __hash__() method of an object which are set by default for any object.
Converting a nested list to a set
>>> a = [1,2,3,4,[5,6,7],8,9]
>>> set(a)
Traceback (most recent call last...
How to create an object for a Django model with a many to many field?
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For future visitors, you can create an object and all of its m2m objects in 2 queries using the new bulk_create in django 1.4. Note that this is only usable if you don't require any pre or post-processing on the data with save() methods or signals. What you insert is exactly...
How can I launch multiple instances of MonoDevelop on the Mac?
...u have a solution already open, and the checkbox only appears when you actually select a solution or project in the dialog.
– Mikayla Hutchinson
Oct 14 '10 at 23:08
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Why does SIGPIPE exist?
...zero timeout) to consume any pending SIGPIPE signal (which is sent to the calling thread, not the process) before unmasking it again.
I believe the reason SIGPIPE exists is much simpler: establishing sane default behavior for pure "filter" programs that continuously read input, transform it somehow...
How to find out what type of a Mat object is with Mat::type() in OpenCV
...";
r += (chans+'0');
return r;
}
If M is a var of type Mat you can call it like so:
string ty = type2str( M.type() );
printf("Matrix: %s %dx%d \n", ty.c_str(), M.cols, M.rows );
Will output data such as:
Matrix: 8UC3 640x480
Matrix: 64FC1 3x2
Its worth noting that there are also Matr...
Foreign keys in mongo?
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tupan
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answered Jun 13 '11 at 17:46
NerianNerian
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How to resize a VirtualBox vmdk file
... iso from within the virtualbox settings).
P.S. If your new size is too small, you'll get the same error even with your new vdi file.
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BaseException.message deprecated in Python 2.6
...of the exception hierarchy.
Provides an 'args' attribute that contains all arguments passed
to the constructor. Suggested practice, though, is that only a
single string argument be passed to the constructor."""
__str__ and __repr__ are already implemented in a meaningful way,
especiall...
How can I extract embedded fonts from a PDF as valid font files?
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You have several options. All these methods work on Linux as well as on Windows or Mac OS X. However, be aware that most PDFs do not include to full, complete fontface when they have a font embedded. Mostly they include just the subset of glyphs used ...