You must have completed Lab 0 and have the following:
In Cloud Datalab, click on the Home icon, and then navigate to notebooks/training-data-analyst/courses/machine_learning/deepdive/10_recommend/labs and open wals.ipynb.
In Datalab, click on Clear | All Cells. Now read the narrative and execute each cell in turn. Some cells have missing code (#TODO) which you have to write before running.
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