Page View Time Series Visualizer test error

Data Analysis with Python Projects

Page View Time Series Visualizer project

I have the code working and passing all but one test which fails with an error. The error happens in the assignment to ‘actual’ from the test:

class DataCleaningTestCase(unittest.TestCase):
    def test_data_cleaning(self):
        actual = int(time_series_visualizer.df.count())
        expected = 1238
        self.assertEqual(actual, expected, "Expected DataFrame count after cleaning to be 1238.")

And the error is:

TypeError: cannot convert the series to <class 'int'>

the return from df.count() is a Pandas Series and if I change the the line to :

 actual = int(time_series_visualizer.df.count()[0])

It passes. Am I missing something or is this an error in the test code?


Hello there,

Could you provide a link to your project, please?

I can’t really change the return type. Here is the code.

The df is set up as a global variable by the starter code and df.count() is a pandas method. It returns an array type (pandas series). I can change the test but these are FCC’s tests and should remain unchanged by me.

Thank you, for pointing this out. I believe the line should be:

actual = int(time_series_visualizer.df.count(numeric_only=True))

Thanks. I put that line in test_module instead.

On second thought, I think the reason you are told to:

Use Pandas to import the data from “fcc-forum-pageviews.csv”. Set the index to the “date” column.

Is so that your df is purely numeric…

So, maybe the tests are correct in expecting numeric values…

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OK That works with the test as is, as long as you drop the date column. (Although I am not sure that should be required to test the count after data cleaning. It wouldn’t hurt to add the argument you suggested.)


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Hello Sky020, I feel your initial suggestion make more sense. Otherwise in draw_bar_plot() session we have to reset the index. Unless this is design intention.

actual = int(time_series_visualizer.df.count(numeric_only=True))


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