visionfans的专栏

creation slicing : is view fancy indexing : is copy

Parallelism and Serialization : how poor pickling breaks multiprocessing Python Pickling and multiprocessing What can multiprocessing and dill do together?

launcher modulelaunch_local() start server and client processes.def launch_local(): """ launches both the server and the clients on the local machine. The number of clients is defined in FLAGS.n

DEFINE_* creates a Flag object and registers it with a FlagValues object (typically the global FlagValues FLAGS).The FlagValues object can scan the command line arguments and pass flag arguments to the

Test codes and pipelinefoo.cpp:#include <boost/python.hpp> #include <iostream>namespace bp = boost::python; using namespace std;class Foo { public: Foo(int n) { cout << "in Foo::Foo()" <<

Python C++ interoperability Bernhard Kaplan’s slides Building Hybrid Systems with Boost.Python Bridging Python to C++ - and vice-versa How does Boost.Python hold C++ class?

I’ve known the basics under the hood, next step: Call Policies Polymophism

Python String Format Cookbook

arr = imread(‘a.jpg’) img = Image.fromarray(arr) arr = np.asarray(img) References: 1. http://effbot.org/zone/pil-changes-116.htm 2. http://stackoverflow.com/questions/384759/pil-and-numpy

IPython extra space issue https://groups.google.com/a/continuum.io/forum/#!topic/anaconda/oRV1Yc-H3IY/discussion Extra space with tab completion in ipython #42 How to stop ipython autocompletion to gen

In pylab mode, not all commands that change a figure would triger the figure update. Only pyplot commands would. Directly change the property of an figure object e.g. ax.text(...) wouldn’t redraw the f

Notes: - random.randint(a, b) : generate a close range [a, b] - np.random.randint(low, higt): generate a open range [low, high) - np.random.random_integers(low, high): generate close range [low, hi

http://dimitri-christodoulou.blogspot.com/2014/04/mixing-opencv-and-scikit-image.html http://mathematica.stackexchange.com/questions/5676/how-to-peel-the-labels-from-marmalade-jars-using-mathematica

LPTHW - Exercise 39: Dictionaries, Oh Lovely Dictionaries PyCon 2010: The Mighty Dictionary