装go

因为 ubuntu 默认装 go 是1.6 的, 不想装 1.6, 准备装 1.8,

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boost.python 迟暮, 久违 pybind11 , 来玩玩

官方介绍

pybind11 is a lightweight header-only library that exposes C++ types in Python and vice versa, mainly to create Python bindings of existing C++ code. Its goals and syntax are similar to the excellent Boost.Python library by David Abrahams: to minimize boilerplate code in traditional extension modules by inferring type information using compile-time introspection.

The main issue with Boost.Python—and the reason for creating such a similar project—is Boost. Boost is an enormously large and complex suite of utility libraries that works with almost every C++ compiler in existence. This compatibility has its cost: arcane template tricks and workarounds are necessary to support the oldest and buggiest of compiler specimens. Now that C++11-compatible compilers are widely available, this heavy machinery has become an excessively large and unnecessary dependency.

编写供 python 调用的 C++ 模块

下载好 pybind11 之后，我们就可以开始对着官方的 pybind11 Tutorial 进行学习了，详细的入门教程及语法请参考官方文档，这里，我们简单演示下如何编写供 python 调用的 C++ 模块.

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一晃2年过去了, 记得曾经看过 boost.asio, 现在 asio 已经可以完全脱离 boost 了,
不过它项目里的一些例子还是依赖 boost 的, 比如他 src 文件夹里的 tests 里的 除了 unit , 其他的大多数还是老的例子,
都是直接包含boost的一些头文件, 也就是依赖boost的

编译注意事项

官网说支持c++11的编译器会自动检测, 然后走asio的standalone模式, 测试了一下, 显然不会.
所以 ASIO_STANDALONE 这个宏是必须得自己加上的,

define ASIO_STANDALONE on your Preprocessor Settings (如: g++ -DASIO_STANDALONE) or as part of the project options.

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更多好用的一键脚本请转 https://github.com/ToyoDAdoubi/doubi

ssr.sh

• 脚本说明: ShadowsocksR 一键安装管理脚本，支持单端口/多端口切换和管理
• 系统支持: CentOS6+ / Debian6+ / Ubuntu14+
• 使用方法: https://doub.io/ss-jc42/
• 项目地址: https://github.com/ToyoDAdoubiBackup/shadowsocksr

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可以把当前脚本目录下的gif转为mp4

脚本会递归目录的子目录

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import moviepy.editor as mp
# vfc = mp.VideoFileClip("binary_tree_preorder_traversal.gif")
# vfc.write_videofile("binary_tree_preorder_traversal.mp4")

# vfc = mp.VideoFileClip(".\\mp/binary_tree_preorder_traversal.gif")
# vfc.write_videofile(".\\mp/binary_tree_preorder_traversal1231.mp4")

import os

def getfilelist(rlist,path, ex_filter):
    for dir,folder,file in os.walk(path):
        for i in file:
            if ex_filter not in i:
                continue
            t = "%s/%s"%(dir,i)
            rlist.append(t)

all_gif_path = []
getfilelist(all_gif_path, ".", ".gif")
print all_gif_path

for _gif_path in all_gif_path:
    vfc = mp.VideoFileClip(_gif_path)
    vfc.write_videofile(_gif_path.replace(".gif", ".mp4"))