Python - Rear element extraction from list of tuples records

Python - Rear element extraction from list of tuples records

Creating a tutorial to extract the last element from each tuple in a list of tuple records:

Objective: Given a list of tuple records, extract the last element from each tuple and return them as a list.

Example:

List of Tuples:
[    (1, 2, 3, 4),    ("apple", "banana", "cherry"),    (5, 6),    (7.1, 8.2, 9.3, 10.4)]

Rear Elements:
[4, "cherry", 6, 10.4]

Step-by-step Solution:

Step 1: Define the list of tuple records.

records = [
    (1, 2, 3, 4),
    ("apple", "banana", "cherry"),
    (5, 6),
    (7.1, 8.2, 9.3, 10.4)
]

Step 2: Create a function to extract the rear element from each tuple.

def extract_rear_elements(tuples_list):
    rear_elements = [tup[-1] for tup in tuples_list if tup]
    return rear_elements

Step 3: Call the function and display the extracted elements.

rear_els = extract_rear_elements(records)
print(rear_els)

Complete Program:

def extract_rear_elements(tuples_list):
    rear_elements = [tup[-1] for tup in tuples_list if tup]
    return rear_elements

# Define the list of tuple records
records = [
    (1, 2, 3, 4),
    ("apple", "banana", "cherry"),
    (5, 6),
    (7.1, 8.2, 9.3, 10.4)
]

# Extract the rear elements and display the result
rear_els = extract_rear_elements(records)
print(rear_els)

Possible Output:

[4, "cherry", 6, 10.4]

This tutorial outlines how to extract the last element from each tuple in a list of tuple records. By employing Python's list comprehension and indexing techniques, you can easily achieve this extraction with minimal lines of code. The guard clause if tup ensures that empty tuples are not processed, thus preventing potential errors.

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