Скачать или смотреть How to Append a Multidimensional List in a Loop in Python

Learn how to create and fill a multidimensional list in Python with iterative values using simple loops.
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Understanding Multidimensional Lists in Python

Creating a multidimensional list in Python can be an essential technique to handle data structures effectively. Often, you might face a scenario where you need to append values into this list during each iteration of a loop. If you're new to Python or having difficulty managing lists, you’re in the right place. In this guide, we'll walk through how to append values to a multidimensional list in a for loop where the indices change with each iteration.

The Problem

Imagine you need to construct a list that has 3 rows and 4 columns. For every iteration of a loop, you'd like to input several values into specific positions of this list. To clarify, let’s say you have three percentages derived from some calculations, and you’d like to populate the first column with these values during the first loop iteration, the second column in the second iteration, and so on.

Desired Output

For the given assignment, your expected output structure should look like this:

[[See Video to Reveal this Text or Code Snippet]]

The Solution

Step 1: Define the List Structure

First, we need to define a list that can hold multiple rows. In Python, you can create an empty list where each inner list will represent a row in your final structure.

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Calculate the Values

Before entering the loop, calculate the values that you would like to insert into the list. This ensures that you have all your percentages calculated beforehand.

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Loop Through the Columns

We now iterate through a range of 4, as we want to fill four columns in total. Within the loop, append the calculated percentages to the correct inner list.

[[See Video to Reveal this Text or Code Snippet]]

Final Output

After running this code, your list will now contain the desired values for each row and column arrangement:

[[See Video to Reveal this Text or Code Snippet]]

This structure showcases the calculated values placed vertically as intended, filling each column in each iteration of the loop.

Conclusion

You have successfully learned how to create and fill a multidimensional list in Python using a for loop. By following these steps, you can adapt this method to handle and store various sets of data in a structured way. Whether you're working on simple projects or handling larger datasets, understanding multidimensional lists will enhance your programming skills in Python.

Feel free to experiment with different values and structures, and see how you can apply this knowledge to your own programs!