w3resource

Python: Check if a given element occurs at least n times in a list

Python List: Exercise - 153 with Solution

Write a Python program to check if a given element occurs at least n times in a list.

Sample Solution:

Python Code:

# Define a function called check_element_in_list that takes three arguments: 'lst' (list), 'x' (element to check), and 'n' (minimum occurrences).
def check_element_in_list(lst, x, n):
    # Initialize a variable 't' to 0.
    t = 0
    
    try:
        # Iterate 'n' times to check for 'x' in the list.
        for _ in range(n):
            # Find the index of 'x' in 'lst' starting from index 't'.
            t = lst.index(x, t) + 1
        
        # If 'x' is found at least 'n' times, return True.
        return True
    
    except ValueError:
        # If 'x' is not found 'n' times, return False.
        return False

# Create a list 'nums' containing integer values.
nums = [0, 1, 3, 5, 0, 3, 4, 5, 0, 8, 0, 3, 6, 0, 3, 1, 1, 0]

# Print a message indicating the original list.
print("Original list:")
print(nums)

# Define 'x' and 'n' for the first check.
x = 3
n = 4

# Print a message indicating that we are checking if 'x' occurs at least 'n' times in the list.
print("\nCheck if", x, "occurs at least", n, "times in a list:")

# Call the 'check_element_in_list' function to check if 'x' occurs at least 'n' times and print the result.
print(check_element_in_list(nums, x, n))

# Define 'x' and 'n' for the second check.
x = 0
n = 5

# Print a message indicating that we are checking if 'x' occurs at least 'n' times in the list.
print("\nCheck if", x, "occurs at least", n, "times in a list:")

# Call the 'check_element_in_list' function to check if 'x' occurs at least 'n' times and print the result.
print(check_element_in_list(nums, x, n))

# Define 'x' and 'n' for the third check.
x = 8
n = 3

# Print a message indicating that we are checking if 'x' occurs at least 'n' times in the list.
print("\nCheck if", x, "occurs at least", n, "times in a list:")

# Call the 'check_element_in_list' function to check if 'x' occurs at least 'n' times and print the result.
print(check_element_in_list(nums, x, n))

Sample Output:

Original list:
[0, 1, 3, 5, 0, 3, 4, 5, 0, 8, 0, 3, 6, 0, 3, 1, 1, 0]

Check if 3 occurs at least 4 times in a list:
True

Check if 0 occurs at least 5 times in a list:
True

Check if 8 occurs at least 3 times in a list:
False

Flowchart:

Flowchart: Check if a given element occurs at least n times in a list.

Python Code Editor:

Previous: Write a Python program to combine two given sorted lists using heapq module.
Next: Write a Python program to join two given list of lists of same length, element wise.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Become a Patron!

Follow us on Facebook and Twitter for latest update.

It will be nice if you may share this link in any developer community or anywhere else, from where other developers may find this content. Thanks.

https://198.211.115.131/python-exercises/list/python-data-type-list-exercise-153.php