gistfile1.pyw

from random import randint


def blamatrix(m, n, min=-100, max=100):
    a = [[randint(min, max) for j in range(n)] for i in range(m)]
    for i,row in enumerate(a):
        others_sum = sum(map(abs, row[:i])) + sum(map(abs, row[i+1:]))
        if abs(row[i]) <= others_sum:
            row[i] = others_sum + 1
    return a


def test_blamatrix(a):
    for i,row in enumerate(a):
        others_sum = sum(map(abs, row[:i])) + sum(map(abs, row[i+1:]))
        if abs(row[i]) <= others_sum:
            raise ValueError('row %d sucks' % i)


a = blamatrix(3,4)
print a
test_blamatrix(a)