How to Remove a Key-Value Pair from a Dictionary in Python

We can remove a key-value pair from a dictionary in Python using the `del` statement. This example demonstrates how to remove a key-value pair by specifying the key and print the dictionary contents before and after the removal.

For example,

my_dict = {
    1: 'One',
    2: 'Two',
    3: 'Three'
}

# Print the dictionary contents before removal
print('Dictionary contents before removal:')
for key, value in my_dict.items():
    print(f'Key: {key}, Value: {value}')

# Key to remove
key_to_remove = 2

# Remove the key-value pair using the del statement
del my_dict[key_to_remove]

# Print the dictionary contents after removal
print('Dictionary contents after removal:')
for key, value in my_dict.items():
    print(f'Key: {key}, Value: {value}')

Dictionary contents before removal:
Key: 1, Value: One
Key: 2, Value: Two
Key: 3, Value: Three
Dictionary contents after removal:
Key: 1, Value: One
Key: 3, Value: Three

We can remove a key-value pair from a dictionary in Python using the `pop` method. This example demonstrates how to remove a key-value pair by specifying the key and print the dictionary contents before and after the removal.

For example,

my_dict = {
    1: 'One',
    2: 'Two',
    3: 'Three'
}

# Print the dictionary contents before removal
print('Dictionary contents before removal:')
for key, value in my_dict.items():
    print(f'Key: {key}, Value: {value}')

# Key to remove
key_to_remove = 2

# Remove the key-value pair using the pop method
my_dict.pop(key_to_remove)

# Print the dictionary contents after removal
print('Dictionary contents after removal:')
for key, value in my_dict.items():
    print(f'Key: {key}, Value: {value}')

Dictionary contents before removal:
Key: 1, Value: One
Key: 2, Value: Two
Key: 3, Value: Three
Dictionary contents after removal:
Key: 1, Value: One
Key: 3, Value: Three

We can check if a key exists before attempting to remove a key-value pair in a dictionary in Python using the `pop` method. This example demonstrates how to check for key existence and remove the key-value pair if it exists, then print the dictionary contents before and after the removal.

For example,

my_dict = {
    1: 'One',
    2: 'Two',
    3: 'Three'
}

# Print the dictionary contents before removal
print('Dictionary contents before removal:')
for key, value in my_dict.items():
    print(f'Key: {key}, Value: {value}')

# Key to remove
key_to_remove = 4

# Check if the key exists and remove it if it does
if key_to_remove in my_dict:
    my_dict.pop(key_to_remove)
    print(f'Key {key_to_remove} was removed from the dictionary.')
else:
    print(f'Key {key_to_remove} does not exist in the dictionary.')

# Print the dictionary contents after removal
print('Dictionary contents after removal:')
for key, value in my_dict.items():
    print(f'Key: {key}, Value: {value}')

Dictionary contents before removal:
Key: 1, Value: One
Key: 2, Value: Two
Key: 3, Value: Three
Key 4 does not exist in the dictionary.
Dictionary contents after removal:
Key: 1, Value: One
Key: 2, Value: Two
Key: 3, Value: Three