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Python: Linked List - Exercises, Practice, Solution

Linked List: [ 14 exercises with solution]

[An editor is available at the bottom of the page to write and execute the scripts.]

1. Write a Python program to create a singly linked list, append some items and iterate through the list. Go to the editor
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2. Write a Python program to find the size of a singly linked list. Go to the editor
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3. Write a Python program to search a specific item in a singly linked list and return true if the item is found otherwise return false. Go to the editor
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4. Write a Python program to access a specific item in a singly linked list using index value. Go to the editor
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5. Write a Python program to set a new value of an item in a singly linked list using index value. Go to the editor
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6. Write a Python program to delete the first item from a singly linked list. Go to the editor
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7. Write a Python program to delete the last item from a singly linked list. Go to the editor
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8. Write a Python program to create a doubly linked list, append some items and iterate through the list (print forward). Go to the editor
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9. Write a Python program to create a doubly linked list and print nodes from current position to first node. Go to the editor
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10. Write a Python program to count the number of items of a given doubly linked list. Go to the editor
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11. Write a Python program to print a given doubly linked list in reverse order. Go to the editor
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12. Write a Python program to insert an item in front of a given doubly linked list. Go to the editor
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13. Write a Python program to search a specific item in a given doubly linked list and return true if the item is found otherwise return false. Go to the editor
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14. Write a Python program to delete a specific item from a given doubly linked list. Go to the editor
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Python: Tips of the Day

Merge dictionaries with single line of code

Code: 

x = {
    'a': 1,
    'b': 2
}

y = {
    'c': 3,
    'd': 4
}

z = {
    'e': 5,
    'f': 6
}
print("Original dictionaries:") 
print(x)
print(y)
print(z)
result = dict(**x, **y)
print("\nMerge two dictionary:")
print(result)
result = dict(**x, **y, **z)
print("\nMerge three dictionary:")
print(result)

Output:

Original dictionaries:
{'a': 1, 'b': 2}
{'c': 3, 'd': 4}
{'e': 5, 'f': 6}

Merge two dictionary:
{'a': 1, 'b': 2, 'c': 3, 'd': 4}

Merge three dictionary:
{'a': 1, 'b': 2, 'c': 3, 'd': 4, 'e': 5, 'f': 6}