Why can't I run the train_ch3 function even though I installed the d2l package 0.17.6?

[Ooodkkk]

import d2l
print(d2l.version)

0.17.6

---

num_epochs, lr = 10, 0.1
updater = torch.optim.SGD(params, lr=lr)
d2l.train_ch3(net, train_iter, test_iter, loss, num_epochs, updater)

AttributeError Traceback (most recent call last)
Cell In[15], line 3
1 num_epochs, lr = 10, 0.1
2 updater = torch.optim.SGD(params, lr=lr)
----> 3 d2l.train_ch3(net, train_iter, test_iter, loss, num_epochs, updater)

AttributeError: module 'd2l' has no attribute 'train_ch3'