Remove Keys

To remove a key-value pair from a dictionary in Python, you can use the following methods:

1. del statement:

Python

my_dict = {"name": "Alice", "age": 30, "city": "New York"}

del my_dict["age"]

print(my_dict)  # Output: {'name': 'Alice', 'city': 'New York'}

2. pop() method:

Python

my_dict = {"name": "Alice", "age": 30, "city": "New York"}

age = my_dict.pop("age")

print(my_dict)  # Output: {'name': 'Alice', 'city': 'New York'}

print(age)  # Output: 30

The pop() method removes the specified key-value pair and returns the value associated with the key. If the key doesn't exist, it raises a KeyError by default, but you can provide a default value to avoid the exception:

Python

value = my_dict.pop("country", "Unknown")

print(value)  # Output: "Unknown"

3. clear() method:

This method removes all key-value pairs from the dictionary:

Python

my_dict.clear()

print(my_dict)  # Output: {}

Key points:

• The del statement and pop() method are both effective for removing keys.

• The pop() method returns the removed value.

• The clear() method removes all elements.

• Be careful with the del statement, as it can raise a KeyError if the key doesn't exist.