Suggestions to Introduction to Data Exploration notebook #354

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1. yakutovicha

   assigned

   yakutovicha

   ,

   despadam

   ,

   edoardob90

   and

   fabioacl

   on Feb 4, 2026
2. yakutovicha

   added

   libraries tutorial

   on Feb 4, 2026
3. yakutovicha

   added the

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   issue type on Feb 4, 2026
4. yakutovicha

   changed the title [-]Suggestions for the `Data Exploration notebok`[/-] [+]Suggestions to `Introduction to Data Exploration` notebook[/+] on Feb 4, 2026
5. despadam

   added this to the Libraries Tutorial 2026 milestone on Feb 4, 2026
6. fabioacl commented on Mar 30, 2026

   

   fabioacl

   on Mar 30, 2026

   Last edited by edoardob90

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   In the section "Finding the limits", the plot is showing float values for Years. Make them integer. Like using:

   from matplotlib.ticker import MaxNLocator
   plt.gca().xaxis.set_major_locator(MaxNLocator(integer=True))
7. fabioacl commented on Mar 30, 2026

   

   fabioacl

   on Mar 30, 2026

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   In "Cleaning missing values" section, its presented that ffill() can be used for filling NaNs. We can also show present bfill() here.
8. fabioacl commented on Mar 30, 2026

   

   fabioacl

   on Mar 30, 2026

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   In "Exercise: Complete Happiness", if one runs the solution solution_clean_dataset without writing anything (only the return), it returns an AttributeError: 'NoneType' object has no attribute 'sort_values', without showing the solution.
9. fabioacl commented on Mar 30, 2026

   

   fabioacl

   on Mar 30, 2026

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   In "Making frames per year" section, # time_column = 'year' is commented. Is this needed?
10. fabioacl commented on Mar 30, 2026

    

    fabioacl

    on Mar 30, 2026

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    In solution solution_frames_with_category, the marked for South Asia it very small (similar to Unknown), is it correct or bug?
11. fabioacl commented on Mar 30, 2026

    

    fabioacl

    on Mar 30, 2026

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    In "Bonus Exercise Fixing a library" section, there is a typo: "and will through an error". Should be throw, right?
12. fabioacl commented on Mar 30, 2026

    

    fabioacl

    on Mar 30, 2026

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    In "Bonus Exercise Fixing a library" section, I found this path: ...modifying only the file data/plotly_intro/bubbly.py until the same code... Isnt it /data/data_exploration/bubbly.py?
13. despadam commented on Mar 30, 2026

    

    despadam

    on Mar 30, 2026

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    In "Exercise: Complete Happiness" I do not think that the 1st question is very clear. I think the sentence "Do this by initializing a DataFrame with pd.DataFrame() with a list" is confusing. Could we explain this a bit better?

    Also here we are asking to merge dataframes but actually explain the merge function below, in the 'Adding regional indicator' paragraph.
14. despadam commented on Mar 30, 2026

    

    despadam

    on Mar 30, 2026

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    In 'Exercise: Final Happiness' we ask to Merge the cleaned_happiness_df with region_df on the 'Country name' and 'year' columns. However, region_df does not have a 'year' column and in fact the proposed solution only does a merge on 'Country name'
15. despadam commented on Mar 30, 2026

    

    despadam

    on Mar 30, 2026

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    In "Making frames per year" section, # time_column = 'year' is commented. Is this needed?

    Same in 'Plotting basic scatter plot'
16. despadam commented on Mar 30, 2026

    

    despadam

    on Mar 30, 2026

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    In "Bonus Exercise Fixing a library" section, I found this path: ...modifying only the file data/plotly_intro/bubbly.py until the same code... Isnt it /data/data_exploration/bubbly.py?

    I am also a bit confused here. Which file are we pointing them too? tutorial/my_bubbly.py has 637 lines, it would be quite difficult for them to read though and identify the differences.
17. despadam commented on Mar 30, 2026

    

    despadam

    on Mar 30, 2026

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    I have created this branch: https://github.com/empa-scientific-it/python-tutorial/tree/fix%2F354-data-exploration
    where I have fixed some typos and added some suggestions to make the text more comprehensible.
18. Snowwpanda

    linked a pull request that will close this issueImprove Data Exploration notebook #368on Apr 14, 2026
19. Snowwpanda

    closed this as completedin #368on Apr 15, 2026
20. Snowwpanda

    reopened this on Apr 15, 2026
21. Snowwpanda commented on Apr 15, 2026

    

    Snowwpanda

    on Apr 15, 2026

    Last edited by edoardob90

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    The new exercise explore_dataset needs some refinement:

    1. function idxmax is used and not mentioned in the list of panda functions
    2. output required is quite specific, make it more flexible
22. Snowwpanda commented on Apr 15, 2026

    

    Snowwpanda

    on Apr 15, 2026

    Last edited by edoardob90

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    Building frames by function: this one is confusing because only one frame is displayed, no animation yet. So maybe lets add a play button:

    'layout': {
            'updatemenus': [{'type': 'buttons', 'buttons': [{'label': '▶', 'method': 'animate', 'args': [None]}]}]
        }

    just to see the difference

    Also there is a get_scatter_figure... used every so often, there should be a comment, that this is boilerplate for the figure
23. edoardob90

    removed their assignment

    on Apr 15, 2026