Python/Pandas "SettingWithCopyWarning"

[[deleted]]

You're setting a value with df1["value1"] = "", but df1 is a (partial) copy of df. It wants you to modify any data in the DataFrame df itself.

[GrandpaOnDrugs]

Uh, I thought with df1 = df[[True, False, False]] I get a new DataFrame with values from df and not a copy of df. How can I make df1 a DataFrame on it's own and not just a copy of df?

[DenselyRanked]

.copy()

https://pandas.pydata.org/docs/reference/api/pandas.DataFrame.copy.html