REMOVING ITEMS FROM PYTHON DICTIONARIES

Table of Contents

INTRODUCTION

There are three methods available in Python for removing items from the dictionary.

del command
pop() method
popitem() method
clear() method

del command

del command is used to delete an existing key from the dictionary.

# REMOVING ITEMS FROM PYTHON DICTIONARIES
# Example 1

dict_class_wise_count = {'A':100, 'B':200, 'C':300, 'D':400, 'E':500}
print("\nList of key value pair of dict_class_wise_count ->", dict_class_wise_count)

del dict_class_wise_count['C']
del dict_class_wise_count['E']

print("\nList of key value pair of dict_class_wise_count ->", dict_class_wise_count)

REMOVING ITEMS FROM PYTHON DICTIONARIES : Output

List of key value pair of dict_class_wise_count -> {'A': 100, 'B': 200, 'C': 300, 'D': 400, 'E': 500}

List of key value pair of dict_class_wise_count -> {'A': 100, 'B': 200, 'D': 400}

In the above example, we have deleted the keys C and D from the dictionary dict_class_wise_count by using del command.

# REMOVING ITEMS FROM PYTHON DICTIONARIES
# Example 2

dict_class_wise_prog = {'A':'Python', 'B':'Java', 'C':'C++', 'D':'PHP', 'E':'XML'}
print("\nList of key value pair of dict_class_wise_prog ->", dict_class_wise_prog)

del dict_class_wise_count['C']
del dict_class_wise_count['D']

print("\nList of key value pair of dict_class_wise_count ->", dict_class_wise_count)

REMOVING ITEMS FROM PYTHON DICTIONARIES : Output

# REMOVING ITEMS FROM PYTHON DICTIONARIES
# Example 2

dict_class_wise_prog = {'A':'Python', 'B':'Java', 'C':'C++', 'D':'PHP', 'E':'XML'}
print("\nList of key value pair of dict_class_wise_prog ->", dict_class_wise_prog)

del dict_class_wise_prog['C']
del dict_class_wise_prog['D']

print("\nList of key value pair of dict_class_wise_prog ->", dict_class_wise_prog)

REMOVING ITEMS FROM PYTHON DICTIONARIES : Output

List of key value pair of dict_class_wise_prog -> {'A': 'Python', 'B': 'Java', 'C': 'C++', 'D': 'PHP', 'E': 'XML'}

List of key value pair of dict_class_wise_prog -> {'A': 'Python', 'B': 'Java', 'E': 'XML'}

pop() method

pop() method is used to remove a key from the dictionary specified in the parameter.

# REMOVING ITEMS FROM PYTHON DICTIONARIES
# Example 3

dict_class_wise_count = {'A':100, 'B':200, 'C':300, 'D':400, 'E':500}
print("\nList of key value pair of dict_class_wise_count ->", dict_class_wise_count)

dict_class_wise_count.pop('C')

print("\nList of key value pair of dict_class_wise_count ->", dict_class_wise_count)

REMOVING ITEMS FROM PYTHON DICTIONARIES : Output

List of key value pair of dict_class_wise_count -> {'A': 100, 'B': 200, 'C': 300, 'D': 400, 'E': 500}

List of key value pair of dict_class_wise_count -> {'A': 100, 'B': 200, 'D': 400, 'E': 500}

In the above example, we have passed the key C as the parameter to pop() method. In the output the C key has been removed.

# REMOVING ITEMS FROM PYTHON DICTIONARIES
# Example 4

dict_class_wise_prog = {'A':'Python', 'B':'Java', 'C':'C++', 'D':'PHP', 'E':'XML'}
print("\nList of key value pair of dict_class_wise_prog ->", dict_class_wise_prog)

dict_class_wise_prog.pop('C')

print("\nList of key value pair of dict_class_wise_prog ->", dict_class_wise_prog)

REMOVING ITEMS FROM PYTHON DICTIONARIES : Output

List of key value pair of dict_class_wise_prog -> {'A': 'Python', 'B': 'Java', 'C': 'C++', 'D': 'PHP', 'E': 'XML'}

List of key value pair of dict_class_wise_prog -> {'A': 'Python', 'B': 'Java', 'D': 'PHP', 'E': 'XML'}

popitem() method

popitem() method is used to remove an item from the end of a dictioanry.

# REMOVING ITEMS FROM PYTHON DICTIONARIES
# Example 5

dict_class_wise_count = {'A':100, 'B':200, 'C':300, 'D':400, 'E':500}
print("\nList of key value pair of dict_class_wise_count ->", dict_class_wise_count)

dict_class_wise_count.popitem()

print("\nList of key value pair of dict_class_wise_count ->", dict_class_wise_count)

REMOVING ITEMS FROM PYTHON DICTIONARIES : Output

List of key value pair of dict_class_wise_count -> {'A': 100, 'B': 200, 'C': 300, 'D': 400, 'E': 500}

List of key value pair of dict_class_wise_count -> {'A': 100, 'B': 200, 'C': 300, 'D': 400}

In the above example, we have used the popitem() method which has removed the last item from the dictionary.

# REMOVING ITEMS FROM PYTHON DICTIONARIES
# Example 6

dict_class_wise_prog = {'A':'Python', 'B':'Java', 'C':'C++', 'D':'PHP', 'E':'XML'}
print("\nList of key value pair of dict_class_wise_prog ->", dict_class_wise_prog)

dict_class_wise_prog.popitem()

print("\nList of key value pair of dict_class_wise_prog ->", dict_class_wise_prog)

REMOVING ITEMS FROM PYTHON DICTIONARIES : Output

List of key value pair of dict_class_wise_prog -> {'A': 'Python', 'B': 'Java', 'C': 'C++', 'D': 'PHP', 'E': 'XML'}

List of key value pair of dict_class_wise_prog -> {'A': 'Python', 'B': 'Java', 'C': 'C++', 'D': 'PHP'}

clear() method

clear() method is used to remove the entire dictionary and clear the memory.

# REMOVING ITEMS FROM PYTHON DICTIONARIES
# Example 7

dict_class_wise_count = {'A':100, 'B':200, 'C':300, 'D':400, 'E':500}
print("\nList of key value pair of dict_class_wise_count ->", dict_class_wise_count)

dict_class_wise_count.clear()

print("\nList of key value pair of dict_class_wise_count ->", dict_class_wise_count)

REMOVING ITEMS FROM PYTHON DICTIONARIES : Output

List of key value pair of dict_class_wise_count -> {'A': 100, 'B': 200, 'C': 300, 'D': 400, 'E': 500}

List of key value pair of dict_class_wise_count -> {}

In the above example, we have used the clear() method against the dictionary dict_class_wise_count and it has removed all the items from the dictionary and empty dictionary has been returned.

# REMOVING ITEMS FROM PYTHON DICTIONARIES
# Example 8

dict_class_wise_prog = {'A':'Python', 'B':'Java', 'C':'C++', 'D':'PHP', 'E':'XML'}
print("\nList of key value pair of dict_class_wise_prog ->", dict_class_wise_prog)

dict_class_wise_prog.clear()

print("\nList of key value pair of dict_class_wise_prog ->", dict_class_wise_prog)

REMOVING ITEMS FROM PYTHON DICTIONARIES : Output

List of key value pair of dict_class_wise_prog -> {'A': 'Python', 'B': 'Java', 'C': 'C++', 'D': 'PHP', 'E': 'XML'}

List of key value pair of dict_class_wise_prog -> {}

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REMOVING ITEMS FROM PYTHON DICTIONARIES