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List of lists changes reflected across sublists unexpectedly
...(3)]
which will reevaluate [1]*4 each time instead of evaluating it once and making 3 references to 1 list.
You might wonder why * can't make independent objects the way the list comprehension does. That's because the multiplication operator * operates on objects, without seeing expressions. Wh...
Hidden features of mod_rewrite
...of it work. As a result I've compiled a few notes on common functionality, and perhaps a few annoying nuances.
8 Answers
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Python: How to get stdout after running os.system? [duplicate]
...t
Or as a function (using shell=True was required for me on Python 2.6.7 and check_output was not added until 2.7, making it unusable here):
def system_call(command):
p = subprocess.Popen([command], stdout=subprocess.PIPE, shell=True)
return p.stdout.read()
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Where are environment variables stored in registry?
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You don't need to restart. Just kill Explorer.exe and bring it back alive. It's the parent process for e.g. cmd.exe (when started from the Start menu)
– Cristian Diaconescu
Dec 8 '12 at 1:04
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What does $1 [QSA,L] mean in my .htaccess file?
I need to change my .htaccess and there are two lines which I don't understand.
3 Answers
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How to link to specific line number on github
...ink to the right lines:
Click on the line number you want (like line 18), and the URL in your browser will get a #L18 tacked onto the end. You literally click on the 18 at the left side, not the line of code. Looks like this:
And now your browser's URL looks like this:
https://github.com/git/gi...
Equation (expression) parser with precedence?
...'ve developed an equation parser using a simple stack algorithm that will handle binary (+, -, |, &, *, /, etc) operators, unary (!) operators, and parenthesis.
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Copy file or directories recursively in Python
Python seems to have functions for copying files (e.g. shutil.copy ) and functions for copying directories (e.g. shutil.copytree ) but I haven't found any function that handles both. Sure, it's trivial to check whether you want to copy a file or a directory, but it seems like a strange omission.
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How to get git diff with full context?
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Thanks @balki, I tried your suggestion and noticed that <pre>$(wc -l MYFILE)</pre> expands to the line count followed by the file name, so the second use of the filename can be omitted also. I'm updating my answer to reflect this.
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Split string using a newline delimiter with Python
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It will work for \r\n and other type of line boundaries as well.
– Ashwini Chaudhary
Feb 26 '14 at 13:37
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