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“Failed to load platform plugin ”xcb“ ” while launching qt5 app on linux without qt installed
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Wow! Thanks so much! Didn't know about qt.conf, it should on the first page of deployment FAQ
– user2440074
Dec 18 '14 at 10:00
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Add unique constraint to combination of two columns
...able and, somehow, the same person got into my Person table twice. Right now, the primary key is just an autonumber but there are two other fields that exist that I want to force to be unique.
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Installing pip packages to $HOME folder
...to $HOME/Library/Python. This might change in a future release. But, for now, on 2.7 (and 3.2, if hg were supported on Python 3), the above locations will be $HOME/Library/Python/x.y/bin/hg and $HOME/Library/Python/x.y/lib/python/site-packages.
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XPath contains(text(),'some string') doesn't work when used with node with more than one Text subnod
... I've edited my answer to provide a long explanation. I don't really know that much about XPath myself -- I just experimented a bit until I stumbled on that combination. Once I had a working combination, I made a guess what was going on and looked in the XPath standard to confirm what I thought...
How do you know when to use fold-left and when to use fold-right?
...accumulator function x
fold x [A, B, C, D]
thus equals
A x B x C x D
Now you just have to reason about the associativity of your operator (by putting parentheses!).
If you have a left-associative operator, you'll set the parentheses like this
((A x B) x C) x D
Here, you use a left fold. Ex...
How to intercept touches events on a MKMapView or UIWebView objects?
...y understand why! That really is annoying. If you find a solution, let me know! Thx
– Martin
Jul 1 '09 at 12:19
Ok, I ...
How do disable paging by swiping with finger in ViewPager but still be able to swipe programmaticall
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Now we no need to create custom ViewPager
A new ViewPager2 name View available in android
Vertical orientation support
ViewPager2 supports vertical paging in addition to traditional horizontal paging. You can enable verti...
Are there any style options for the HTML5 Date picker?
I am really stoked about the HTML5 date picker. It is refreshing to know that the W3C is finally picking up some of the slack so we don't have to keep re-inventing such a common form of input.
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How to write to an existing excel file without overwriting data (using pandas)?
...s writer.sheets to access the sheet.
## If you leave it empty it will not know that sheet Main is already there
## and will create a new sheet.
writer.sheets = dict((ws.title, ws) for ws in book.worksheets)
data_filtered.to_excel(writer, "Main", cols=['Diff1', 'Diff2'])
writer.save()
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Open document with default OS application in Python, both in Windows and Mac OS
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except OSError, e:
print >>sys.stderr, "Execution failed:", e
Now, what are the advantages of using subprocess?
Security: In theory, this is more secure, but in fact we're needing to execute a command line one way or the other; in either environment, we need the environment and servic...