Python Counter Exercises & Solutions

Python counter Data Type [ 10 exercises with solution ]

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A Counter is a dict subclass for counting hashable objects. It is a collection where elements are stored as dictionary keys and their counts are stored as dictionary values. Counts are allowed to be any integer value including zero or negative counts. The Counter class is similar to bags or multisets in other languages.

1. Write a Python program to create a 'Counter' of the letters in the string "Python Exercise!".
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2. Write a Python program that creates a 'Counter' from a list of elements and print the most common elements along with their counts.
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3. Write a Python program that creates a counter of the vowels in the word "Python Exercises".
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4. Write a Python program that creates two 'Counter' objects and finds their union, intersection, and difference.
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5. Write a Python program that creates a counter of the words in a sentence and prints the words in ascending and descending order of their frequency.
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6. Write a function that takes two 'Counter' objects and returns their sum.
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7. Write a Python program that creates a 'Counter' for a list of items and converts it to a list of unique items with their counts.
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8. Write a Python program that creates a 'Counter' for a list of words and removes all items with a count less than a certain value..
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9. Write a python program to find the Jaccard similarity coefficient between two lists using 'Counter' objects.
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10. Write a Python program that creates a 'Counter' for a list of items and uses dictionary-style access to update the count of specific items.
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