Series.fillna() does not have any purpose

Hi, I’m at the instruction section of 10/11 page, and I see the following instruction:

fillna02

Turns out that I verified my result set at this point and other two on github and I don’t see why I should use series.fillna() there aren’t any missing values, am I wrong?

Above is one example of what I’ve found.

Could you share your project here please? Thanks

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Sorry for my tardiness. The project is in my first draft version yet, though I have moved forward on the next mission.Guided_Project_Clean_And_Analyze_Employee_Exit_Surveys.ipynb (434.6 KB)

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