The use of the SetDefault () method of manipulating dictionaries in Python

This article mainly introduces the use of the SetDefault () method of manipulating dictionaries in Python, which is the basic knowledge in Python's introductory study, and the friends who need it can refer to

The SetDefault () method is similar to the Get () method, but sets the dictionary [key]= default if the key is not already in the dictionary.

Method

The following is the syntax for the SetDefault () method:

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1	Dict.setdefault (Key, Default=none)

Parameters

Key-This is the button to be searched

Default-This is the value returned without the key being found.

return value

This method returns the key value available for the dictionary and returns the supplied default value if the given key is not available.

Example

The following example shows the use of the SetDefault () method.

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#!/usr/bin/python dict = {' Name ': ' Zara ', ' Age ': 7} print ' Value:%s '% dict.setdefault (' age ', None) print ' Value:% S "% dict.setdefault (' Sex ', None)

When we run the above program, it produces the following results:

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1 2	Value:7 Value:none