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CommandError: You must set settings.ALLOWED_HOSTS if DEBUG is False
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Try
ALLOWED_HOSTS = ['*']
Less secure if you're not firewalled off or on a public LAN, but it's what I use and it works.
EDIT: Interestingly enough I've been needing to add this to a few of my 1.8 projects even when DEBUG = True. Very unsure why.
EDIT: This is ...
Which UUID version to use?
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There are two different ways of generating a UUID.
If you just need a unique ID, you want a version 1 or version 4.
Version 1: This generates a unique ID based on a network card MAC address and a timer. These IDs are easy to predict (giv...
What is the “assert” function?
...erminate the program (usually with a message quoting the assert statement) if its argument turns out to be false. It's commonly used during debugging to make the program fail more obviously if an unexpected condition occurs.
For example:
assert(length >= 0); // die if length is negative.
You...
Check for array not empty: any?
Is it bad to check if an array is not empty by using any? method?
6 Answers
6
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How can I get the behavior of GNU's readlink -f on a Mac?
...It returns that file's canonicalized name—i.e., its absolute pathname.
If you want to, you can just build a shell script that uses vanilla readlink behavior to achieve the same thing. Here's an example. Obviously you could insert this in your own script where you'd like to call readlink -f
#...
UnicodeDecodeError, invalid continuation byte
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In binary, 0xE9 looks like 1110 1001. If you read about UTF-8 on Wikipedia, you’ll see that such a byte must be followed by two of the form 10xx xxxx. So, for example:
>>> b'\xe9\x80\x80'.decode('utf-8')
u'\u9000'
But that’s just the mechanical ca...
How do I use Assert to verify that an exception has been thrown?
...recommend using it since it is not flexible enough. Consider what happens if the exception type is thrown by your test setup code: test passes, but didn't actually do what you expected. Or what if you want to test the state of the exception object. I usually want to use StringAssert.Contains(e.Mes...
Check element CSS display with JavaScript
Is it possible to check if an element's CSS display == block or none using JavaScript?
9 Answers
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Are non-synchronised static methods thread safe if they don't modify static class variables?
I was wondering if you have a static method that is not synchronised, but does not modify any static variables is it thread-safe? What about if the method creates local variables inside it? For example, is the following code thread-safe?
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How to wait in bash for several subprocesses to finish and return exit code !=0 when any subprocess
...and with $! you get the PID of the last command launched in background.
Modify the loop to store the PID of each spawned sub-process into an array, and then loop again waiting on each PID.
# run processes and store pids in array
for i in $n_procs; do
./procs[${i}] &
pids[${i}]=$!
done
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