Validation problem with assignement "Auto-Complete"

Course Q&A Natural Language Processing NLP with Probabilistic Models
1

I don’t understand why the test failed at the step : " Preprocess data"
Here’s my code:

FAIL 3
FAIL 31424×623 39.1 KB

Here’s the expected results, and my results: (it’s the same)

FAIL 4
FAIL 41397×513 9.31 KB

And finally at the end, the failed " Preprocess data" step:

FAIL 5
FAIL 51739×904 63.4 KB

If someone could help me ?
Thanks you.

2

I don’t see you explicitly using the unknown_token. If the grader is using a different token, would that explain what you’re seeing?