python-checkio/Mine/skew-symmetric-matrix.py

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2020-01-08 17:32:09 +01:00
def checkio(matr):
clone = zip(*matr)
modifiedClone = []
for row in clone:
modifiedClone.append(list(map(mult, row)))
for i, row in enumerate(matr):
for j, cell in enumerate(matr[i]):
if cell != modifiedClone[i][j]:
return False
return True
def mult(e):
return -1 * e
if __name__ == '__main__':
assert checkio([[0, 1, 2],
[-1, 0, 1],
[-2, -1, 0]]) == True, 'First'
assert checkio([[0, 1, 2],
[-1, 1, 1],
[-2, -1, 0]]) == False, 'Second'
assert checkio([[0, 1, 2],
[-1, 0, 1],
[-3, -1, 0]]) == False, 'Third'
print('All ok')