SettingWithCopyWarning in pandas

What it is, why it crops up, and how to get rid of it

(tl;dr: jump straight to Getting rid of SettingWithCopyWarnings if you’re here for answers)

If you are a pandas user, chances are you’ve seen the SettingWithCopyWarning crop up when you’re assigning values to a pd.DataFrame or pd.Series.

In [1]: import pandas as pd
     …:
     …: df = pd.DataFrame({
     …:     “A”: [1, 2, 3, 4, 5],
     …:     “B”: [6, 7, 8, 9, 10],
     …:     }, index=range(5)
     …: ) …

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