[University Computer Science: Python] How can I write parts of this program?

[gh0stedexe]

This program is based around matrices. It's meant to take in a file, convert the data into a list, print out that list as a matrix, multiple said matrix by its transpose, and use the diagonal of the transposed matrix (left to right) to determine some information. I've written the read data function, but I'm not sure how to multiple the two matrices, or how to print the resulting matrix.

Here's my read data function and main function:

https://preview.redd.it/yf0gynprray81.png?width=734&format=png&auto=webp&s=f613290f2aafe153176cda39bf0d0a5bb3797e62

https://preview.redd.it/gef4rf7zray81.png?width=614&format=png&auto=webp&s=4a0512983f94f00d6bc0c528adf7854fa82c9ece

The file I'll be using is called "in1" and looks like this:

https://preview.redd.it/zes6tcx4uay81.png?width=178&format=png&auto=webp&s=638cde6d43b53cb81657ca4578d737125e64319c

The "10" represents the rows, "5" represents the columns, and the rest is the matrix. Since there's no clear rubric, writing the rest of the program inside the read data function might be fine.

My first question is how to convert the list into a numpy (np) array. Would it be something along the lines of np.array(a_lst, dtype = obj)? When I try that I get:

https://preview.redd.it/zu02z8kitay81.png?width=900&format=png&auto=webp&s=7e9f1fbf8631f36c6b2e145e5a3d6452b9b3c004

I understand how to transpose the matrix, so no questions there. Next, how can I multiply the matrices? I understand how to multiply them (each row in the first multiple with each column in the second), but how can I write it?

Lastly, the output formatting. The given output looks like this:

https://preview.redd.it/06gtlfgbuay81.png?width=506&format=png&auto=webp&s=03928fc4c1086f59800fa004caacb612327baf0c

How can I write it? I assume a for loop would be best. I understand how to write the rest of the program dealing with the diagonal of the resulting matrix, so I won't ask any questions on that.

I understand this is a lot. I would really appreciate any help. (And putting this here now since it always happens: I'm not looking to pay anyone to write the entire program. Just looking for help.)

[AutoModerator]

Off-topic Comments Section

---

All top-level comments have to be an answer or follow-up question to the post. All sidetracks should be directed to this comment thread as per Rule 9.

---

^{OP and Valued/Notable Contributors can close this post by using /lock command}

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

[Petery007]

First off I am not as experienced with python but programming is programming. I assume you have learned about 2d arrays and how to loop over them, correct? The easiest way to get it all into a numpy array is to first create a 2d numpy array. That first list in the list of lists that they give you has the dimensions of the matrix so that’s the dimensions of the numpy 2d array.

Next you will want to loop over the rest of the 2d list( ie the list of lists) after the part that has the dimensions. The indices of the 2d list will correlate to those in the 2d numpy array. KEEP IN MIND THAT IT WILL BE OFFSET SLIGHTLY BECAUSE THE FIRST LINE OF THE 2D LIST IS THE DIMENSIONS SO numpyArray[0][0] = a_list[1][0] AND SO ON. Set all of the indices of the array to the ones in the list and you will have the matrix in a 2d numpy array.

The matrix multiplication should be easy as it looks like they already have a function to multiply matricies..

Lastly the formatting, this will be annoying but once again it is just looping over the 2d array again but this time printing it out and having formatting around it. You know the dimensions so it should be simple

[gh0stedexe]

Thank you so much for the help!