How to Safely Retrieve Dictionary Values with a Default When a Key Doesn\'t Exist?

Retrieving Dictionary Value with Default on Non-Existence

When accessing a dictionary, attempting to retrieve a value for a non-existent key results in a KeyError. To handle this scenario gracefully, a method is required to safely retrieve the value or return a default value.

The solution lies within the get() method of the dictionary. By employing this method, you can specify a default value to be returned when the key is absent:

value = d.get(key)

If the key exists in the dictionary, it returns the corresponding value. Otherwise, it returns None.

Furthermore, you can provide a custom default value to be returned:

value = d.get(key, "empty")

In this example, if the key is not found in the dictionary, the string "empty" will be returned.

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