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How do I set environment variables from Java?
How do I set environment variables from Java? I see that I can do this for subprocesses using ProcessBuilder . I have several subprocesses to start, though, so I'd rather modify the current process's environment and let the subprocesses inherit it.
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Redirect stdout pipe of child process in Go
...= os.Stdin thereby making it as if you had literally executed that command from your shell.
– Nucleon
May 28 '14 at 0:49
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How to redirect output with subprocess in Python?
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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, you can avoid system calls entirely:
import shutil
with open('myfile', 'w') as outfile:
for infile in ('file...
Why is creating a Thread said to be expensive?
...urces as long as it is alive; e.g. the thread stack, any objects reachable from the stack, the JVM thread descriptors, the OS native thread descriptors.
The costs of all of these things are platform specific, but they are not cheap on any Java platform I've ever come across.
A Google search foun...
How can I check the system version of Android?
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From SDK: "The user-visible version string. E.g., "1.0" or "3.4b5"." .... "3.4b5" how can I determine which version number is it ?
– davs
Mar 7 '12 at 15:17
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What killed my process and why?
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This is the Linux out of memory manager (OOM). Your process was selected due to 'badness' - a combination of recentness, resident size (memory in use, rather than just allocated) and other factors.
sudo journalctl -xb
You'll see a message like:
Jul 20 11:05:00 someapp kernel: Mem-Info...
Exit codes in Python
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From the documentation for sys.exit:
The optional argument arg can be an
integer giving the exit status
(defaulting to zero), or another type
of object. If it is an integer, zero
is considered “successful termin...
How do I determine file encoding in OS X?
... That's a function call you would use if you want to write a program. From the command line, just type ls -l@ <filename> to see what attributes are set for the file. To see the actual attribute, type xattr -p com.apple.TextEncoding <filename>
– Edward Falk
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I need to securely store a username and password in Python, what are my options?
I'm writing a small Python script which will periodically pull information from a 3rd party service using a username and password combo. I don't need to create something that is 100% bulletproof (does 100% even exist?), but I would like to involve a good measure of security so at the very least it w...
Disable output buffering
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From Magnus Lycka answer on a mailing list:
You can skip buffering for a whole
python process using "python -u"
(or#!/usr/bin/env python -u etc) or by
setting the environment variable
PYTHONUNBUFFERED.
You could also replace...