Common methods for operating dictionary types in Python

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The has_key() method can check whether the dictionary contains the specified key. If so, then Return True, otherwise return False.

Grammar format:

2.clear() method

Used to clear all items in the dictionary, no return value.

Usage:

3, copy method

copy() The method returns a new dictionary with the same key-value pairs in the following format:

4,fromkeys() method

Use the given keys to create a new dictionary, and the value corresponding to each key value is None.

5, update() method

Format:

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