Loop on dataframe lines python

for index, row in df.iterrows():
    print(f'Index: {index}, row: {row.values}')

for index, row in df.iterrows():
    print(f'Index: {index}, column_a: {row.get("column_a", 0)}')

for row in df.itertuples():
    print(row)

# But !
# The .apply() function provides a more efficient
# method for updating a DataFrame.
# see : https://towardsdatascience.com/pandas-apply-for-power-users-f44d0e0025ce

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