ValueError Traceback (most recent call last)

in

1 from public_tests import *

2

----> 3 model_test(model)

~/work/release/W2A2/public_tests.py in model_test(target)

123 y_test = np.array([[0, 1, 0]])

124

→ 125 d = target(X, Y, x_test, y_test, num_iterations=50, learning_rate=0.01)

126

127 assert type(d[‘costs’]) == list, f"Wrong type for d[‘costs’]. {type(d[‘costs’])} != list"

in model(X_train, Y_train, X_test, Y_test, num_iterations, learning_rate, print_cost)

36 # YOUR CODE STARTS HERE

37 w, b = np.zeros((X_train.shape[0],1)) , float(0)

—> 38 params, grads, costs = optimize(w, b, X, Y, num_iterations=100, learning_rate=0.009, print_cost=False)

39 Y_prediction_test = Y_test.shape[1]

40 Y_prediction_train = Y_train.shape[1]

in optimize(w, b, X, Y, num_iterations, learning_rate, print_cost)

35 # grads, cost = …

36 # YOUR CODE STARTS HERE

—> 37 grads, cost = propagate(w, b, X, Y)

38

39 # YOUR CODE ENDS HERE

in propagate(w, b, X, Y)

32 # YOUR CODE STARTS HERE

33

—> 34 A = sigmoid(np.dot(w.T,X)+b)

35 # cost = -np.sum(np.dot(Y.T,np.log(A))+np.dot((1-Y).T,np.log(1-A)))/m

36 cost = -1/m * np.sum( np.dot(np.log(A), Y.T) + np.dot(np.log(1-A), (1-Y.T)))

<**array_function** internals> in dot(*args, **kwargs)

ValueError: shapes (1,4) and (2,3) not aligned: 4 (dim 1) != 2 (dim 0)

how to correct it??