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      如何在Python中向字典添加新键?

      How can I add new keys to a dictionary in Python?(如何在Python中向字典添加新键?)

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                本文介绍了如何在Python中向字典添加新键?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                问题描述

                是否可以在创建Python字典后向其添加键?

                它似乎没有.add()方法。

                推荐答案

                您可以通过为键赋值来在字典上创建新键/值对

                d = {'key': 'value'}
                print(d)  # {'key': 'value'}
                
                d['mynewkey'] = 'mynewvalue'
                
                print(d)  # {'key': 'value', 'mynewkey': 'mynewvalue'}
                

                如果键不存在,它将被添加并指向该值。如果它存在,则它指向的当前值将被覆盖。

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