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Calculating arithmetic mean (one type of average) in Python
... return float(sum(numbers)) / max(len(numbers), 1)
>>> mean([1,2,3,4])
2.5
>>> mean([])
0.0
In numpy, there's numpy.mean().
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How to redirect output with subprocess in Python?
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UPDATE: os.system is discouraged, albeit still available in Python 3.
Use os.system:
os.system(my_cmd)
If you really want to use subprocess, here's the solution (mostly lifted from the documentation for subprocess):
p = subprocess.Popen(my_cmd, shell=True)
os.waitpid(p.pid, 0)
OTOH,...
str performance in python
While profiling a piece of python code ( python 2.6 up to 3.2 ), I discovered that the
str method to convert an object (in my case an integer) to a string is almost an order of magnitude slower than using string formatting.
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How do I see the current encoding of a file in Sublime Text?
...popular result in google search, here is the way to do it for sublime text 3 build 3059+:
in user preferences, add the line:
"show_encoding": true
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Python Empty Generator Function
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135
You can use return once in a generator; it stops iteration without yielding anything, and thus ...
PendingIntent does not send Intent extras
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3 Answers
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Where is the .NET Framework 4.5 directory?
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153
.NET 4.5 is an in place replacement for 4.0 - you will find the assemblies in the 4.0 directory....
When using Spring Security, what is the proper way to obtain current username (i.e. SecurityContext)
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If you are using Spring 3, the easiest way is:
@RequestMapping(method = RequestMethod.GET)
public ModelAndView showResults(final HttpServletRequest request, Principal principal) {
final String currentUser = principal.getName();
}
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Can functions be passed as parameters?
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232
Yes, consider some of these examples:
package main
import "fmt"
// convert types take an int...
What's the best three-way merge tool? [closed]
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13 Answers
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