Python – Convert List to custom overlapping nested list
Given a list, the task is to write a Python program to convert it into a custom overlapping nested list based on element size and overlap step.
Examples:
Input: test_list = [3, 5, 6, 7, 3, 9, 1, 10], step, size = 2, 4
Output: [[3, 5, 6, 7], [6, 7, 3, 9], [3, 9, 1, 10], [1, 10]]
Explanation: Rows sliced for size 4, and overcoming started after 2 elements of current row.
Input: test_list = [3, 5, 6, 7, 3, 9, 1, 10], step, size = 2, 3
Output: [[3, 5, 6], [6, 7, 3], [3, 9, 1], [1, 10]]
Explanation: Rows sliced for size 3, and overcoming started after 2 elements of current row.
Method #1: Using list slicing + loop
In this, row size is managed by slicing operation and overlap step is managed by step mentioned in range() while using a loop for iteration.
Python3
# Python3 code to demonstrate working of# Convert List to custom overlapping Matrix# Using list slicing + loop # initializing listtest_list = [3, 5, 6, 7, 3, 9, 1, 10] # printing original listprint("The original list is : " + str(test_list)) # initializing step, sizestep, size = 2, 4 res = []for idx in range(0, len(test_list), step): # slicing list res.append(test_list[idx: idx + size]) # printing resultprint("The created Matrix : " + str(res)) |
Output:
The original list is : [3, 5, 6, 7, 3, 9, 1, 10]
The created Matrix : [[3, 5, 6, 7], [6, 7, 3, 9], [3, 9, 1, 10], [1, 10]]
Method #2: Using list comprehension
In this, similar functionality as the above method is used with a variation of having shorthand using list comprehension.
Python3
# Python3 code to demonstrate working of# Convert List to custom overlapping Matrix# Using list comprehension # initializing listtest_list = [3, 5, 6, 7, 3, 9, 1, 10] # printing original listprint("The original list is : " + str(test_list)) # initializing step, sizestep, size = 2, 4 # list comprehension used as shorthand to solve problemres = [test_list[idx: idx + size] for idx in range(0, len(test_list), step)] # printing resultprint("The created Matrix : " + str(res)) |
Output:
The original list is : [3, 5, 6, 7, 3, 9, 1, 10]
The created Matrix : [[3, 5, 6, 7], [6, 7, 3, 9], [3, 9, 1, 10], [1, 10]]
