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Argparse: Required argument 'y' if 'x' is present
...ts of options.
The simplest way to deal with this would be:
if args.prox and (args.lport is None or args.rport is None):
parser.error("--prox requires --lport and --rport.")
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How to create an array containing 1…N
...is what you're looking for, why do you need an array? A simple var n = 45; and then looping from 1..n would do.
– casablanca
Sep 19 '10 at 18:33
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How to insert a newline in front of a pattern?
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This works in bash and zsh, tested on Linux and OS X:
sed 's/regexp/\'$'\n/g'
In general, for $ followed by a string literal in single quotes bash performs C-style backslash substitution, e.g. $'\t' is translated to a literal tab. Plus, sed ...
A Space between Inline-Block List Items [duplicate]
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I have seen this and answered on it before:
After further research I have
discovered that inline-block is a
whitespace dependent method and
is dependent on the font setting. In this case 4px is rendered.
To avoid this you could run all ...
How to split a comma-separated value to columns
...his should not be the accepted answer... A multi-statement TVF (very bad!) and a WHILE loop (even worse) together will perform awfully. Besides, this is a code-only answer and does not even solve the issue There are much better approaches around! For SQL-Server 2016+ look for STRING_SPLIT() (which d...
Why does z-index not work?
So if I understand z-index correctly, it would be perfect in this situation:
4 Answers
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How to deal with INSTALL_PARSE_FAILED_INCONSISTENT_CERTIFICATES without uninstall?
...r developer's machine). Or, the old one is signed with your production key and the new one is signed with your debug key.
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How to convert DOS/Windows newline (CRLF) to Unix newline (LF) in a Bash script?
... up with no data in the file.
You can't do it the other way round (with standard 'tr').
If you know how to enter carriage return into a script (control-V, control-M to enter control-M), then:
sed 's/^M$//' # DOS to Unix
sed 's/$/^M/' # Unix to DOS
where the '^M' is the control-M charact...
JavaScript: How do I print a message to the error console?
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Install Firebug and then you can use console.log(...) and console.debug(...), etc. (see the documentation for more).
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RabbitMQ / AMQP: single queue, multiple consumers for same message?
I am just starting to use RabbitMQ and AMQP in general.
12 Answers
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