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Magic number in boost::hash_combine
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Because Python's floating point number doesn't have enough precision, the 64-bit golden ratios above are not correct. The actual result should be 0x9e3779b97f4a7c15.
– kennytm
Nov 27 '15 at 15:0...
Getting the return value of Javascript code in Selenium
...ion in my webpage and I want to call that and get the return value into my Python code, what can I call to do that?
2 Answe...
Output first 100 characters in a string
Can seem to find a substring function in python.
8 Answers
8
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Redis command to get all available keys?
...re a Redis command for fetching all keys in the database? I have seen some python-redis libraries fetching them. But was wondering if it is possible from redis-client.
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Find region from within an EC2 instance
...f you want to avoid regular expression, here's a one-liner you can do with Python:
curl -s http://169.254.169.254/latest/dynamic/instance-identity/document | python -c "import json,sys; print json.loads(sys.stdin.read())['region']"
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MySQL, better to insert NULL or empty string?
...eep in mind is that NULL might make your codepaths much more difficult. In Python for example most database adapters / ORMs map NULL to None.
So things like:
print "Hello, %(title)s %(firstname) %(lastname)!" % databaserow
might result in "Hello, None Joe Doe!" To avoid it you need something li...
pytest: assert almost equal
...thing that works not only with floats but for example Decimals you can use python's math.isclose:
# - rel_tol=0.01` is 1% difference tolerance.
assert math.isclose(actual_value, expected_value, rel_tol=0.01)
Docs - https://docs.python.org/3/library/math.html#math.isclose
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How can I see the current value of my $PATH variable on OS X?
...ched in the following order:
/usr/local/share/npm/bin
/Library/Frameworks/Python.framework/Versions/2.7/bin
/usr/local/bin
/usr/local/sbin
~/bin
/Library/Frameworks/Python.framework/Versions/Current/bin
/usr/bin
/bin
/usr/sbin
/sbin
/usr/local/bin
/opt/X11/bin
/usr/local/git/bin
To me this list a...
Run cron job only if it isn't already running
...-one
then add run-one before your crontab script
*/20 * * * * * run-one python /script/to/run/awesome.py
Check out this askubuntu SE answer. You can find link to a detailed information there as well.
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Common elements comparison between 2 lists
...ed by S.Mark and SilentGhost generally tell you how it should be done in a Pythonic way, but I thought you might also benefit from knowing why your solution doesn't work. The problem is that as soon as you find the first common element in the two lists, you return that single element only. Your solu...