Answers for "set column value from another column dataframe"

change column value based on another column pandas

# Changes the 'is_electric' column based on value in the 'type' column
# If the 'type' column == 'electric' then the 'is_electric' becomes 'YES'
df['is_electric']= df['type'].apply(lambda x: 'YES' if (x == 'electric') else 'NO')

set value based on column

df.loc[df['c1'] == 'Value', 'c2'] = 10