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        gevent概況


        gevent是一個著名的開發框架。通過本課程可以學習到gevent的各個組件的原理、使用方法及高級技巧,并在實踐中掌握gevent的應用場景,最后通過部分源碼分析徹底掌握多開發編程的核心技巧。



        gevent是什么


        Gevent是一個基于libev的并發庫。它為各種并發和網絡相關的任務提供了整潔的API。



        gevent起源


        1.主要開發者:Denis Bilenko;


        2.能夠查到的最早版本。


        gevent1.png



        gevent發展


        1.github代碼貢獻者由幾位增加到57位;


        2.代碼更新也非常頻繁,我可以看到下面這張圖,是它的代碼更新的頻率的一個圖示。


        gevent2.png



        gevent特點


        1.基于libev的高效時間循環


        Libev是什么?


        Libev是高性能事件循環/事件模型的網絡庫,并且包含大量新特性。它是繼lievent之后的一套全新網絡庫。它追求的目標:速度更快,bug更少,特性更多,體積更小。它和libevent很像,按照作者的介紹,可以作為libevent的替代者,能夠提供更高的性能,并且不需要復雜配置。


        2.基于greenlet的輕量級執行單元


        3.重用Python標準庫API內容(比如Events,Queues)


        4.socket協同ssl


        5.利用線程池或者c-cares 來執行DNS查詢


        6.靈猴補丁能夠協同第三方庫



        誰在使用gevent


        1.database drivers


        2.Web servers


        3.Applications



        安裝gevent


        1.推薦的平臺:max osx 或者Linux(Ubuntu)


        2.會使用pip指令


        1)pip是什么?


        pip是一個python包管理工具,主要用于安裝PyPI上的軟件包;


        2)如何安裝;


        3)Mac:brew install python - pip;


        4)Ubuntu:sudo apt - get install python - pip ;


        5)使用方法:pip install SomePackage;


        6)查看已經安裝的軟件:pip show SomePackage;


        7)卸載軟件:pip uninstall SomePackage。


        3.安裝virtualenv


        1)virtualenv是什么?


        virtualenv用來創建隔離的python環境;


        處理Python環境的多版本和模塊依賴,以及相應的權限是一個很常見的問題。比如,你有一個應用使用的是lib1,但是另一個應用卻要使用lib2.如何處理呢?如果把所有的模塊安裝到 / usr /lib / python 2.7 /site - package (或者是你本機的python默認的模塊安裝目錄),那你極有可能無意中升級一些不該升級的模塊;


        它會創建一個擁有獨立安裝目錄的Python環境,該隔離環境不會與其他virtualenv環境共享模塊(可選擇是否訪問全局庫目錄);


        使用:virtualenv venv;


        Source venv / activate;


        deactivate。


        4.Pip install gevent


        5.檢測是否安裝成功


        6.Windows安裝參考:http://lutaf.com/57.htm



        前期準備


        1.Pycharm


        2.iTerm2


        3.版本管理工具git 或者 svn


        4.github賬戶



        學習方法


        1.興趣;


        2.目的性;


        3.學會搜索;


        4.多寫代碼。



        【本文由麥子學院獨家原創,轉載請注明出處并保留原文鏈接】

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