Answer:
D. a lookup
Explanation:
'Looking up' values based on keys from a dictionary is known as key look up.
A dictionary is a data structure used in Python for storing the values of several items.
A dictionary in Python is an unordered collection of items where each item is stored as a key:value pair. In dictionaries, we map an object that maps individual values with unique keys.
A lookup fetches the requested values of keys in the dictionary for operation. In the example given, a lookup is made for the key, K in dictionary, d, checking if its value is v, and returning (printing) k if the lookup is matched.
Python dictionaries are used to store data in pairs i.e. keys and values.
The Python code is used as (d) a lookup
The code segment is given as:
if d[k] == v:
return k
The if condition checks, if the value at key k of dictionary d is v.
In other words, it looks up for the value of v in the dictionary.
Hence, the correct option is (d) a lookup
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