Doc: Adds example of exploding lists into columns instead of storing in dataframe cells #19215
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pdpark
commented
Jan 12, 2018
pdpark
commented
- closes DOC: section on caveats of storing lists inside DataFrame/Series #17027
Codecov Report
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## master #19215 +/- ##
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+ Coverage 91.53% 91.55% +0.02%
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Lines 48797 48797
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+ Hits 44664 44676 +12
+ Misses 4133 4121 -12
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| Alternative to storing lists in DataFrame Cells | ||
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needs to be the same length as the title
| nearest_neighbors = [['Zach LaVine', 'Jeremy Lin', 'Nate Robinson', 'Isaia']]*3 | ||
| nearest_neighbors | ||
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make things into separate ipython:: python blocks, rather than using comments (you can simply write text and not use the #)
| nearest_neighbors | ||
| #. Create an index with the "parent" columns to be included in the final Dataframe | ||
| df2 = pd.concat([df[['name','opponent']], pd.DataFrame(nearest_neighbors)], axis=1) |
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you don't need to keep naming the dataframes, just use
df = ..... or whatever
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| Storing nested lists/arrays inside a pandas object should be avoided for performance and memory use reasons. Instead they should be "exploded" into a flat ``DataFrame`` structure. | ||
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| Example of exploding nested lists into a DataFrame: |
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since you have 2 examples you can use another level of sub-section
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can you update |
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can you rebase and update |
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Will do - have been absent due to starting new job, but plan to spend some time on this. |
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Closing as discontinued. Superseded by #23041 |
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