Sample function not correct [DLS 5, Week 1, Exercise 2]

Hello all,

I’m stuck on the 2nd programming exercise in DLS 5 ( Dinosaur Island-Character-Level Language Modeling). The problem occurs in UNQ_C2 - sample() There are no runtime errors, but the final assertion fails as shown below:

AssertionError                            Traceback (most recent call last)
<ipython-input-91-a13d660e654a> in <module>
     19     print("\033[92mAll tests passed!")
---> 21 sample_test(sample)

<ipython-input-91-a13d660e654a> in sample_test(target)
     15     assert indices[-1] == char_to_ix['\n'], "All samples must end with \\n"
     16     assert min(indices) >= 0 and max(indices) < len(char_to_ix), f"Sampled indexes must be between 0 and len(char_to_ix)={len(char_to_ix)}"
---> 17     assert np.allclose(indices[0:6], [23, 16, 26, 26, 24, 3]), "Wrong values"
     19     print("\033[92mAll tests passed!")

AssertionError: Wrong values

Here’s my code for the sample() function

{mentor edit: code removed

I’ve checked multiple times that the equations a, z and y match up with the instructions, and they do, so I don’t understand why I’m getting a different answer from the grader. Any help would be appreciated!


Do not use tanh() when you compute z.
That’s not shown in the equations.

Also you do not need len(y.ravel(). Just “len(y)” is sufficient.

Wow, completely missed that somehow. Thanks!