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How to call an external command?
...e flexible (you can get the stdout, stderr, the "real" status code, better error handling, etc...).
The official documentation recommends the subprocess module over the alternative os.system():
The subprocess module provides more powerful facilities for spawning new processes and retrieving the...
How to view corresponding SQL query of the Django ORM's queryset?
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You also can use python logging to log all queries generated by Django. Just add this to your settings file.
LOGGING = {
'disable_existing_loggers': False,
'version': 1,
'handlers': {
'console': {
# logging handler that outputs log...
What does cherry-picking a commit with Git mean?
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This is in contrast with other ways such as merge and rebase which normally apply many commits onto another branch.
Make sure you are on the branch you want to apply the commit to.
git checkout master
Execute the following:
git cherry-pick <commit-hash>
N.B.:
If you cherry-pick f...
rails 3.1.0 ActionView::Template::Error (application.css isn't precompiled)
...and there are missing precompiled files you will get an "AssetNoPrecompiledError" indicating the name of the missing file.
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Force DOM redraw/refresh on Chrome/Mac
...ging in through the DOM inspector is often enough to get it to realize the error of its ways and redraw correctly, so it's provably the case that the markup is good. This happens frequently (and predictably) enough in a project I'm working on that I've put code in place to force a redraw in certain...
Case insensitive XPath contains() possible?
...fox and Chrome? I just tried it in the console and they both return syntax error.
– d-b
Jun 8 '19 at 11:51
1
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Why is using 'eval' a bad practice?
...or later. Even an innocent input like: Let's have fun. will cause a syntax error and expose the vulnerability.
– Nadia Alramli
Dec 2 '09 at 16:20
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Tar archiving that takes input from a list of files
...e this: tar -cvf allfiles.tar --exclude='^#' -T mylist.txt. Tar reports an error, but when you check your tar archive, there are no errors, and all files from the list are inside your archive.
– Matt G
Oct 31 '18 at 6:05
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How do I determine k when using k-means clustering?
... clear is how you choose the value of k. Is it just a matter of trial and error, or is there more to it?
19 Answers
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How can I do division with variables in a Linux shell?
... commands in my shell as below, it returns an expr: non-integer argument error. Can someone please explain this to me?
6 ...