dict.setdefault() method in Python

The setdefault()method is used to retrieve a value from a dictionary given its key. If an item with the given key does not exist in the dictionary, it adds it and sets a given value for it.

The syntax is as shown below:

d.setdefault(key, value = None)

| key | The key whose associated value is to be retrieved |

| value | The value to be set if the item with the given key does not exist. It defaults …

dictionary key python syntax the key value