Python中将两个字典进行合并操作，是一个比较常见的问题。本文将介绍几种实现两个字典合并的方案，并对其进行比较。
对于这个问题，比较直观的想法是将两个字典做相加操作，赋值给结果字典，其代码为：
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dictMerged1 = dict( dict1.items() + dict2.items() ) |
然而，该方法合并时所用时间较长，效率更高的代码为：
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dictMerged2 = dict( dict1, **dict2 ) |
仅以pythonic的官方解释替代Hello World!作为本博的第一篇文章。
>>> import this
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The Zen of Python, by Tim Peters Beautiful is better than ugly. Explicit is better than implicit. Simple is better than complex. Complex is better than complicated. Flat is better than nested. Sparse is better than dense. Readability counts. Special cases aren't special enough to break the rules. Although practicality beats purity. Errors should never pass silently. Unless explicitly silenced. In the face of ambiguity, refuse the temptation to guess. There should be one-- and preferably only one --obvious way to do it. Although that way may not be obvious at first unless you're Dutch. Now is better than never. Although never is often better than *right* now. If the implementation is hard to explain, it's a bad idea. If the implementation is easy to explain, it may be a good idea. Namespaces are one honking great idea -- let's do more of those! |
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