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Why does multiprocessing use only a single core after I import numpy?

...affinity on import. As far as I can tell, this problem seems to be specifically caused by them linking against multithreaded OpenBLAS libraries. A workaround is to reset the task affinity using os.system("taskset -p 0xff %d" % os.getpid()) With this line pasted in after the module imports, my ex...
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How can I build a small operating system on an old desktop computer? [closed]

...in, as I know writing an operating system is unbearably complicated (especially by oneself). 20 Answers ...
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What is the difference/usage of homebrew, macports or other package installation tools? [closed]

...t exist. MacPorts is a native application: C + TCL. You don't need Ruby at all. To install Ruby on Mac OS X you might need MacPorts, so just go with MacPorts and you'll be happy. MacPorts is really stable, in 8 years I never had a problem with it, and my entire Unix ecosystem relay on it. If you are...
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What is the python “with” statement designed for?

I came across the Python with statement for the first time today. I've been using Python lightly for several months and didn't even know of its existence! Given its somewhat obscure status, I thought it would be worth asking: ...
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What REALLY happens when you don't free after malloc?

... Just about every modern operating system will recover all the allocated memory space after a program exits. The only exception I can think of might be something like Palm OS where the program's static storage and runtime memory are pretty much the same thing, so not freeing mig...
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Wait for a process to finish

... Note that lsof uses polling, that +r 1 is the timeout, I am personally looking for a solution for MacOS that does not use polling. – Alexander Mills Feb 28 '18 at 16:58 ...
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Running Python code in Vim

...th python Explanation: autocmd: command that Vim will execute automatically on {event} (here: if you open a python file) [i]map: creates a keyboard shortcut to <F9> in insert/normal mode <buffer>: If multiple buffers/files are open: just use the active one <esc>: leaving insert...
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How to avoid .pyc files?

... I just tried this and, it does work for imported modules. Specifically, once this variable is set anything imported later won't generate pyc files. This is delightful. Thanks. – user234736 Nov 22 '12 at 19:59 ...
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[科普] __MACOSX是什么文件夹? - 更多技术 - 清泛网 - 专注C/C++及内核技术

[科普] __MACOSX是什么文件夹?(如图,一般的设计源文件都会有__MACOSX这个目录)以下为网上搜到的资料:MacOS作为他们的开发环境。例如,许多来自领先的网络框架组织的... (如图,一般的设计源文件都会有__MACOSX这个目录) ...
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Difference between \n and \r?

...e 10 and 13 respectively;-). But seriously, there are many: in Unix and all Unix-like systems, \n is the code for end-of-line, \r means nothing special as a consequence, in C and most languages that somehow copy it (even remotely), \n is the standard escape sequence for end of line (translated to...