How does the clear() method work in Python dictionaries?

a) Removes all key-value pairs from the dictionary

b) Removes a specific key-value pair from the dictionary

c) Adds a new key-value pair to the dictionary

d) Copies all key-value pairs to a new dictionary

Answer:

a) Removes all key-value pairs from the dictionary

Explanation:

The clear() method in Python dictionaries removes all key-value pairs, effectively emptying the dictionary. After calling clear(), the dictionary will be empty but still exist in memory.

# Example of clear() method
student = {"name": "John", "age": 20, "major": "Computer Science"}
student.clear()
print(student)  # Output: {}

In this example, the clear() method is used to remove all the key-value pairs from the student dictionary, leaving it empty.

The clear() method is useful when you need to reset a dictionary or remove all its contents without deleting the dictionary itself.