删除重复的熊猫 df

Question

Trying use the DataFrame.drop_duplicates parameters but without luck as the duplicates are not being removed.

Looking to remove based on column "inc_id". If find duplicates in that column should keep only the last row.

My df is:

    inc_id  inc_cr_date
0   1049670 121
1   1049670 55
2   1049667 121
3   1049640 89
4   1049666 12
5   1049666 25

Output should be:

    inc_id  inc_cr_date
0   1049670 55
1   1049667 121
2   1049640 89
3   1049666 25

Code is:

df = df.drop_duplicates(subset='inc_id', keep="last")

Any idea what am I missing here? Thanks.

Answer 1

I think you are just looking to drop the original index :

In [11]: df.drop_duplicates(subset='inc_id', keep="last").reset_index(drop=True)
Out[11]:
    inc_id  inc_cr_date
0  1049670           55
1  1049667          121
2  1049640           89
3  1049666           25

Answer 2

For dataframe df, duplicate rows can be dropped using this code.

df = pd.read_csv('./data/data-set.csv')
print(df['text'])

def clean_data(dataframe):
    # Drop duplicate rows
    dataframe.drop_duplicates(subset='text', inplace=True)

clean_data(df)
print(df['text'])

Answer 3

f.drop_duplicates(subset='inc_id', keep="last").reset_index(drop=True)