How to create a python matrix function from a list without using numpy?

Question

I am new to Python and have been struggling to create a matrix from a sequence of integers(i.e. *range(2,17)) without using numpy.

def create_matrix(*NumList, rows, cols):

    Fmat = []
    for row in range(rows):
        Imat = []
        for col in range(cols):
            Imat.append(None)
        Fmat.append(Imat)
    return Fmat

print (create_matrix(*range(2, 17), rows=3, cols=5))

How can I replace 'None' with NumList so the matrix will take the integers from the range instead, as I encounter an error when appending more than 1 argument using append(). Moreover, how can I ensure that the shape of matrix can match with the numbers (i.e. print error message if the matrix cannot be possibly generated).

Thanks for your help! 　

alvst · Accepted Answer · 2020-04-20 04:04:48Z

0

If I understand what you are trying to do correctly, you only made a mistake on one line, Imat.append(None) I do not understand why you are appending none.

Check out this link, Creating a Matrix in Python without Numpy. It should solve your issue!

answered Apr 20, 2020 at 4:04

alvst

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1 Comment

user13341473 Over a year ago

Thanks, that really helps! I am appending none as I am trying to double check if I have made some errors when creating the matrix.

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