How to remove apostrophes in a matrix

[killerrex]

What I was suggesting is this:

import csv
 
with open('numbers.csv', newline='') as csvfile:
    puzzle=csv.reader(csvfile, delimiter=' ', quotechar='|')
    # Read all the rows so you get
    # matrix = [[0, 0, 9, 0, 0, 0, 5, 6, 2], [0, 0, 0, 9, 0, 0, 0, 0, 0], ...]
    matrix = [row for row in puzzle]

# If now you want to print the matrix
for row in matrix:
    print(', '.join(row))

# Or transform it to integer matrix and not just strings... assuming all the elements are integers.
matrix =[[int(s) for s in row] for row in matrix]

About using eval... avoid it as much as you can. It is useful and powerful, specially when you are a noob but almost anything you can do with eval you can do it better in another way without the risk of explosion (not to mention the huge security problem)