Unsupported operand type(s) for /: 'list' and 'list'

Добрый день!
Использую код отсюда https://github.com/omartinsky/... rman.ipynb
Код 7 ячейки выдает ошибку:

TypeError Traceback (most recent call last)
<ipython-input-89-d447267d867b> in <module>()
21
22 W = array(caps) / sum(caps) # calculate market weights from capitalizations
---> 23 R, C = assets_historical_returns_and_covariance s(prices)
24 rf = .015 # Risk-free rate

<ipython-input-89-d447267d867b> in assets_historical_returns_and_covariance s(prices)
9 for c in range(cols - 1):
10 p0, p1 = prices[r, c], prices[r, c + 1]
---> 11 returns[r, c] = (p1 / p0) - 1
12 # calculate returns
13 expreturns = array([])

TypeError: unsupported operand type(s) for /: 'list' and 'list'

Меняю строчку returns[r, c] = (p1 / p0) - 1 на returns[r, c] = (p1 / p0) - 1, тогда выдает ошибку:

ValueError Traceback (most recent call last)
<ipython-input-90-c928189288f6> in <module>()
22
23 W = array(caps) / sum(caps) # calculate market weights from capitalizations
---> 24 R, C = assets_historical_returns_and_covariance s(prices)
25 rf = .015 # Risk-free rate

<ipython-input-90-c928189288f6> in assets_historical_returns_and_covariance s(prices)
10 p0, p1 = prices[r, c], prices[r, c + 1]
11 # returns[r, c] = (p1 / p0) - 1
---> 12 returns[r, c] = np.divide(p1, p0)-1
13 # calculate returns
14 expreturns = array([])

ValueError: operands could not be broadcast together with shapes (251,) (500,)

len(po) b len(p1) выдает по 500.

Помогите плз разобраться c ошибкой.

Добавлено через 50 минут
Сорри, ошибся менял строчку returns[r, c] = (p1 / p0) - 1 на returns[r, c] = np.divide(p1, p0)-1, тогда выдает ошибку:ValueError: operands could not be broadcast together with shapes (251,) (500,)

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