Got warning on Part 6: SettingWithCopyWarning #16
Description
This warning is not error, but I think it should be better if double check again the code.
A value is trying to be set on a copy of a slice from a DataFrame
See the caveats in the documentation: https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#returning-a-view-versus-a-copy
Although, this warning will be off if set_option to None:
pd.set_option('mode.chained_assignment', None)