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What is the meaning of the term arena in relation to memory?
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From http://www.bozemanpass.com/info/linux/malloc/Linux_Heap_Contention.html:
The libc.so.x shared library contains the glibc component and the heap
code resides inside it. The current implementation of the heap uses
multiple independent sub-heaps called...
【内核源码】linux UDP实现 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
【内核源码】linux UDP实现linux-udp创建udp socket在socket()创建的时候，会设置对应协议的操作集。 inet_dgram_ops是系统调用层直接调用的操作。udp_prot是底层协议的处理。可以看到相比TCP，UDP不用accept(),lis 创建udp socket
在socket()创建...
How do I get the picture size with PIL?
How do I get a size of a pictures sides with PIL or any other Python library?
7 Answers
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How can I quantify difference between two images?
...ot, you may need to resize or crop them. PIL library will help to do it in Python.
If they are taken with the same settings and the same device, they are probably the same.
Are images well-aligned?
If not, you may want to run cross-correlation first, to find the best alignment first. SciPy has fun...
A weighted version of random.choice
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Since Python 3.6 there is a method choices from the random module.
Python 3.6.1 (v3.6.1:69c0db5050, Mar 21 2017, 01:21:04)
Type 'copyright', 'credits' or 'license' for more information
IPython 6.0.0 -- An enhanced Interactive Pytho...
Does pandas iterrows have performance issues?
...pply
a) reductions that can be performed in cython
b) iteration in python space
4) itertuples
5) iterrows
6) updating an empty frame (e.g. using loc one-row-at-a-time)
Using a custom Cython routine is usually too complicated, so let's skip that for now.
1) Vectorization is ALWAYS, ALWAYS ...
How can I open the interactive matplotlib window in IPython notebook?
I am using IPython with --pylab=inline and would sometimes like to quickly switch to the interactive, zoomable matplotlib GUI for viewing plots (the one that pops up when you plot something in a terminal Python console). How could I do that? Preferably without leaving or restarting my notebook.
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How to handle exceptions in a list comprehensions?
I have some a list comprehension in Python in which each iteration can throw an exception.
6 Answers
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Change the name of a key in dictionary
I want to change the key of an entry in a Python dictionary.
15 Answers
15
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What do people think of the fossil DVCS? [closed]
... I like about Fossil:
1) We have a bunch of machines (win/mac/a number of linux distros), and the single-executable installation is just as beautiful as it sounds. No dependencies; it just works. Git is a messy pile of files and the dependency hell in Subversion makes it very nasty on some Linux di...