[Solved] Truble to create a matrix for sudoku in python

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Keep looping, know to find 9 different numbers in line = []

import random
matrix = []
for i in range(9):
    line = []
    j = 1
    while j <= 9:
        number = random.randint(1, 9)
        if number not in line:
            line.append(number)
            j += 1
    matrix.append(line)

for i in range(9):
    print(matrix[i])

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solved Truble to create a matrix for sudoku in python