Python哲学:优雅,明确,简单
在进入 Python 的具体学习之前,我们先来看看一些有趣的东西。
进入 Python 安装目录,Python/Lib/idlelib/,运行 idle.bat,然后输入 import this,你会看到下面的一段话:
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Python 2.7.5 (default, May 15 2013, 22:44:16) [MSC v.1500 64 bit (AMD64)] on win32
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Type “copyright”, “credits” or “license()” for more information.
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import this
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The Zen of Python, by Tim Peters
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Beautiful is better than ugly. 优美胜于丑陋
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Explicit is better than implicit. 明了胜于晦涩
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Simple is better than complex. 简单胜过复杂
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Complex is better than complicated. 复杂胜过凌乱
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Flat is better than nested. 扁平胜于嵌套
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Sparse is better than dense. 间隔胜于紧凑
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Readability counts. 可读性很重要
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Special cases aren’t special enough to break the rules. 即使假借特例的实用性之名,也不违背这些规则
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Although practicality beats purity. 虽然实用性次于纯度
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Errors should never pass silently. 错误不应该被无声的忽略
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Unless explicitly silenced. 除非明确的沉默
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In the face of ambiguity, refuse the temptation to guess. 当存在多种可能时,不要尝试去猜测
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There should be one– and preferably only one –obvious way to do it. 应该有一个,最好只有一个,明显能做到这一点
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Although that way may not be obvious at first unless you’re Dutch.虽然这种 方式可能不容易,除非你是python之父
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Now is better than never. 现在做总比不做好
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Although never is often better than right now. 虽然过去从未比现在好
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If the implementation is hard to explain, it’s a bad idea. 如果这个实现不容易解释,那么它肯定是坏主意
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If the implementation is easy to explain, it may be a good idea. 如果这个实现容易解释,那么它很可能是个好主意
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Namespaces are one honking great idea – let’s do more of those! 命名空间是一种绝妙的理念,应当多加利用
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这就是 Python 之禅,Guido van Rossum一定是个有趣的人,能将设计思想展现在python解释器中,在“hello world”程序开始之前,它还有一番人生哲学啊。