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select、poll、epoll之间的区别总结[整理] - C/C++ - 清泛网 - 专注C/C++及内核技术
select、poll、epoll之间的区别总结[整理]select，poll，epoll都是IO多路复用的机制。I O多路复用就通过一种机制，可以监视多个描述符，一旦某个描述符就绪（一般是读就绪或者写就绪...select，poll，epoll都是IO多路复用的机制。I/O多路...
互联网CEO们的办公桌长什么样？ - 资讯 - 清泛网 - 专注C/C++及内核技术
互联网CEO们的办公桌长什么样？CEO们的办公桌各有特色，也有共性，火眼金睛的各位可以尝试下对这些CEO们的性格、工作习惯等进行一些解读。办公桌是人们离不开的工作伙伴，办公室的摆设就像人的名片一样，会透露人们的性...
Compiling with g++ using multiple cores
...ou run in many environments, this can change a lot) you may use ubiquitous Python function cpu_count():
https://docs.python.org/3/library/multiprocessing.html#multiprocessing.cpu_count
Like this:
make -j $(python3 -c 'import multiprocessing as mp; print(int(mp.cpu_count() * 1.5))')
If you're as...
How to activate an Anaconda environment
...would need to set the PATH for your environment (so that it gets the right Python from the environment and Scripts\ on Windows).
Imagine you have created an environment called py33 by using:
conda create -n py33 python=3.3 anaconda
Here the folders are created by default in Anaconda\envs, so you...
马无夜草不肥——聊聊程序员接私活的那些坑 - 杂谈 - 清泛网 - 专注C/C++及内核技术
马无夜草不肥——聊聊程序员接私活的那些坑搬砖苦啊，搬砖累啊，努力干活工资不涨还心累啊。码农当自强，于是部分程序猿媛开始了天知地知客户知的私活。但接私活会活少钱多来钱快么？...
搬砖苦啊，搬砖累啊，努力干...
Render HTML to PDF in Django site
...Try the solution from Reportlab.
Download it and install it as usual with python setup.py install
You will also need to install the following modules: xhtml2pdf, html5lib, pypdf with easy_install.
Here is an usage example:
First define this function:
import cStringIO as StringIO
from xhtml2pdf ...
创业者：在寻找 不迷茫 - 资讯 - 清泛网 - 专注C/C++及内核技术
...寻找 不迷茫经历两年创业热潮，中国创业环境出现了新的常态，投资者更加慎重，对创业项目审核要求提高，投资范围也在缩小。这些让一部分创业后来者感到生存“艰难”，但依然无法打消大多数人的创业想法。经历两年创...
C++读写EXCEL文件方式比较 - C/C++ - 清泛网 - 专注C/C++及内核技术
C++读写EXCEL文件方式比较C++读取Excel的XLS文件的方法有很多，但是也许就是因为方法太多，大家在选择的时候会很疑惑。由于前两天要做导表工具，比较了常用的方法， C++读取Excel的XLS文件的方法有很多，但是也许就是因为方法...
Selecting multiple columns in a pandas dataframe
...lumns) then you can do this instead:
df1 = df.iloc[:, 0:2] # Remember that Python does not slice inclusive of the ending index.
Additionally, you should familiarize yourself with the idea of a view into a Pandas object vs. a copy of that object. The first of the above methods will return a new copy...
Autoreload of modules in IPython [duplicate]
Is there a way to have IPython automatically reload all changed code? Either before each line is executed in the shell or failing that when it is specifically requested to. I'm doing a lot of exploratory programming using IPython and SciPy and it's quite a pain to have to manually reload each module...