Um valor está tentando ser definido em uma cópia de uma fatia de um DataFrame.
# Error:
# SettingWithCopyWarning: A value is trying to be set on a copy of a
# slice from a DataFrame
# As explained in the Source, this warning is usually safe to ignore. You
# can disable it by running the following:
import pandas as pd
pd.options.mode.chained_assignment = None # default='warn'
Charles-Alexandre Roy