(Row sorting) Implement the following function to sort the...

(Row sorting) Implement the following function to sort the rows in a twodimensional list. A new list is returned and the original list is intact. def sortRows(m): Write a test program that prompts the user to enter a $3 \times 3$ matrix of numbers and displays a new row-sorted matrix. Here is a sample run:

(Row sorting) Implement the following function to sort the rows in a twodimensional list. A new list is returned and the original list is intact.
def sortRows(m):
Write a test program that prompts the user to enter a $3 \times 3$ matrix of numbers and displays a new row-sorted matrix. Here is a sample run:

Key Concepts

Function Definition and Modular Programming

Defining functions, such as the sortRows function in the question, is a key programming practice that promotes modularity and reusability. By encapsulating specific behavior (like sorting rows of a matrix) within a function, the code becomes more organized, easier to test, and maintainable.

Input and Output for Matrices

Handling input and output for a matrix involves collecting user input to form a two-dimensional list and then formatting this list for display. This requires parsing user input appropriately and dealing with nested iteration structures when printing or manipulating the matrix, which is a common task in many programming applications.

Python's Built-In Sorting

Python provides built-in functions, such as sorted() and list.sort(), that allow for efficient and straightforward sorting operations. Using these functions helps simplify the implementation of row sorting in a two-dimensional list by leveraging optimized algorithms to order the row elements.

Row Sorting

Row sorting refers to the process of sorting each individual row of a two-dimensional list independently. This involves taking each inner list, applying a sorting algorithm (or a built-in function) to rearrange its elements in a specified order, and then assembling the sorted rows into a new two-dimensional list. This is a common operation in data processing and algorithms that require ordered row elements.

Two-Dimensional Lists

A two-dimensional list is essentially a list of lists, where each inner list represents a row in a matrix-like structure. This data structure is commonly used to represent grids, tables, or matrices, and its manipulation is a fundamental concept in programming, especially in tasks involving numeric or tabular data.

Immutability of the Original Data Structure

When modifying data structures, it is often important to maintain the integrity of the original data. In this context, the function is expected to return a new sorted version of the matrix while leaving the original matrix unchanged. This approach helps to avoid bugs that might arise from unintended side effects when altering data in place.

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