How python uses clear () to delete dictionary key-value pairs

Clear () delete dictionary key-value pair: clear everything in the dictionary, but do not delete the dictionary itself, del delete dictionary itself dict4 = {'name':' Tom', 'age': 18} dict4.clear () print (dict4)

Return: {}

Dict (dictionary) in python:

1. The dictionary is another variable container model, in which each key-value pair is separated by a colon (:), each key-value pair is separated by a comma (,), and the whole dictionary is surrounded by curly braces {}

two。 The key in the dictionary is generally unique. If repeated, the following key-value pair will overwrite the previous one, but the dictionary value does not need to be unique.

3. The value can take any data type, but the key must be an immutable type, such as a string, number, or tuple, but not a list because the list is mutable.

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