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Python Dictionary | get method

schedule Aug 10, 2023
Last updated
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Python
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Python's Dictionary.get(~) method returns the value for the specified key in a dictionary.

Parameters

1. key | any type

The key to be searched in the dictionary.

2. value | any type | optional

The value to be returned if the key is not found. Default is None.

Return Value

If key exists in dictionary: the value for the key.

If key does not exist in dictionary and no value is specified in input: None.

If key does not exist in dictionary and value is specified in input: specified value.

Examples

Basic usage

When the key exists in dictionary:

cars = {'Toyota': 'Green', 'Nissan':'Yellow', 'Honda':'Blue'}
cars.get('Nissan')
'Yellow'

When the key does not exist in dictionary and no value is specified in input:

cars = {'Toyota': 'Green', 'Nissan':'Yellow', 'Honda':'Blue'}
print(cars.get('Renault'))
None

When the key does not exist in dictionary and value is specified in input:

cars = {'Toyota': 'Green', 'Nissan':'Yellow', 'Honda':'Blue'}
cars.get('Renault','Other')
'Other'

Difference between Dictionary.get(~) method and dict[key]

The Dictionary.get() method returns a default value if the key is missing.

cars = {'Toyota': 'Green', 'Nissan':'Yellow', 'Honda':'Blue'}
print(cars.get('Renault'))
None

If key is missing when using dict[key], KeyError exception is raised.

cars = {'Toyota': 'Green', 'Nissan':'Yellow', 'Honda':'Blue'}
cars['Renault']
KeyError: 'Renault'
robocat
Published by Isshin Inada
Edited by 0 others
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