Condições de contornos Dirichlet

[VitorACs]

Estou iniciando agora no DeepXDE e estou com um pouco de dificuldade em entender meu erro. Segui o passo a passo da documentação e o exemplo dele, mas da erro. Segue o Código:

`import deepxde as dde
import matplotlib.pyplot as plt
import numpy as np

def pde(x, y):
dy_xx = dde.grad.hessian(y,x)
return dy_xx

def boundary1(x, _):
return dde.utils.isclose(x[0], 0)

def boundary2(x, _):
return dde.utils.isclose(x[0], 0.1)

def func1(x):
return 100

def func2(x):
return 20

geom = dde.geometry.Interval(0, 0.1)
bc1 = dde.icbc.DirichletBC(geom, func1, boundary1)
bc2 = dde.icbc.DirichletBC(geom, func2, boundary2)
data = dde.data.PDE(geom, pde, [bc1,bc2], 16, 2, num_test=100)

layer_size = [1] + [50] * 3 + [1]
activation = "tanh"
initializer = "Glorot uniform"
net = dde.nn.FNN(layer_size, activation, initializer)

model = dde.Model(data, net)
model.compile("adam", lr=0.001, metrics=["l2 relative error"])

losshistory, train_state = model.train(iterations=10000)

dde.saveplot(losshistory, train_state, issave=True, isplot=True)

x = geom.uniform_points(1000, True)
y = model.predict(x, operator=pde)
plt.figure()
plt.plot(x, y)
plt.xlabel("x")
plt.ylabel("PDE residual")
plt.show()`

O seguinte erro aparece:
"Traceback (most recent call last):
File "d:\import deepxde as dde.py", line 46, in
losshistory, train_state = model.train(iterations=10000)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\costa\AppData\Roaming\Python\Python311\site-packages\deepxde\utils\internal.py", line 22, in wrapper
result = f(*args, **kwargs)
^^^^^^^^^^^^^^^^^^
File "C:\Users\costa\AppData\Roaming\Python\Python311\site-packages\deepxde\model.py", line 636, in train
self._test()
File "C:\Users\costa\AppData\Roaming\Python\Python311\site-packages\deepxde\model.py", line 845, in _test
self.train_state.metrics_test = [
^
File "C:\Users\costa\AppData\Roaming\Python\Python311\site-packages\deepxde\model.py", line 846, in
m(self.train_state.y_test, self.train_state.y_pred_test)
File "C:\Users\costa\AppData\Roaming\Python\Python311\site-packages\deepxde\metrics.py", line 12, in l2_relative_error
return np.linalg.norm(y_true - y_pred) / np.linalg.norm(y_true)
~~~~~~~^~~~~~~~
TypeError: unsupported operand type(s) for -: 'NoneType' and 'float'"

Se alguém puder me ajudar agradeço demais.