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This article mainly shows you "what are the main features of the python dictionary", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "what are the main features of the python dictionary" this article.

The main features of dictionaries

1: read by key rather than by index

2: a dictionary is an unordered collection of arbitrary objects

3: dictionaries are variable and can be nested at will

4: dictionary keys must be unique

5: the keys of the dictionary must be immutable

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