Python: Count the same pair in two given lists using map function

Last update on April 22 2025 12:56:25 (UTC/GMT +8 hours)

13. Count Same Pair Map

Write a Python program to count the same pair in two given lists. Use map() function.

Sample Solution:

Python Code:

# Import the 'eq' function from the 'operator' module
from operator import eq

# Define a function 'count_same_pair' that takes two lists as input and returns the number of pairs with equal elements
def count_same_pair(nums1, nums2):
    # Use the 'map' function with 'eq' to create a list of True/False values for corresponding elements in 'nums1' and 'nums2'
    # Sum the True values to get the count of pairs with equal elements
    result = sum(map(eq, nums1, nums2))
    # Return the result
    return result

# Define two lists 'nums1' and 'nums2'
nums1 = [1, 2, 3, 4, 5, 6, 7, 8]
nums2 = [2, 2, 3, 1, 2, 6, 7, 9]

# Print the original lists
print("Original lists:")
print(nums1)
print(nums2)

# Print a newline for better readability
print("\n")

# Print the number of pairs with equal elements in the two lists
print("Number of same pair of the said two given lists:")
print(count_same_pair(nums1, nums2))

Sample Output:

Original lists:
[1, 2, 3, 4, 5, 6, 7, 8]
[2, 2, 3, 1, 2, 6, 7, 9]

Number of same pair of the said two given lists:
4

For more Practice: Solve these Related Problems:

• Write a Python program to use map to compare elements of two lists and count how many pairs are identical.
• Write a Python program to map a lambda that returns 1 for matching elements in two lists, then sum the results.
• Write a Python program to use map to generate a list of booleans indicating equality between two lists and then count the True values.
• Write a Python program to use map to produce a list of indices where elements of two lists are the same, and then count these indices.

Go to:

• Python Map Exercises Home ↩
• Python Exercises Home ↩

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Python Code Editor:

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