Use the setdefault () method for dictionary operations in Python

Use the setdefault () method for dictionary operations in Python

This article mainly introduces the use of the setdefault () method for dictionary operations in Python. It is the basic knowledge of getting started with Python. For more information, see

The setdefault () method is similar to the get () method, but the dictionary [Key] = is set by default if the key is not already in the dictionary.

Method

The following is the syntax of the setdefault () method:

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1	Dict. setdefault (key, default = None)

Parameters

Key -- this is the key to be searched

Default -- this is the value returned if no key is found.

Return Value

This method returns the available dictionary key values. If a given key is unavailable, it returns the default value provided.

Example

The following example shows how to use 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 will produce the following results:

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1 2	Value: 7 Value: None