The setdefault() method returns the value of the specified key if the value is not in the dictionary, otherwise the default value.
Example
#!/usr/bin/python3
# -*- coding: UTF-8 -*-
dict1 = {'Name': 'Volkswagen', 'Vehicle type': 'SUV','Turbo':'no','Price': 150000}
print(dict1)
print ("the value of key Price is : %s" %dict1.setdefault('Price', 0))
print(dict1)
print ("the value of key gearbox is : %s" %dict1.setdefault('gearbox', None))
print(dict1)
Output:
{'Name': 'Volkswagen', 'Vehicle type': 'SUV', 'Turbo': 'no', 'Price': 150000}
the value of key Price is : 150000
{'Name': 'Volkswagen', 'Vehicle type': 'SUV', 'Turbo': 'no', 'Price': 150000}
the value of key gearbox is : None
{'Name': 'Volkswagen', 'Vehicle type': 'SUV', 'Turbo': 'no', 'Price': 150000, 'gearbox': None}
Syntax
dictionary.setdefault(key[, default_value])
Parameters
| Name | Description |
| key | The key value of the lookup. |
| default_value | The default value to be returned if the key is not in the dictionary. |
Return Value
It returns the values of the specified key if the value is not in the dictionary, otherwise it returns the default value.