Pandas: Using index set value in a specific cell in a given dataframe

Last update on May 01 2025 12:56:01 (UTC/GMT +8 hours)

8. Set Value in Specific Cell using Index

Write a Pandas program to set value in a specific cell in a given dataframe using index.

Test Data:

0        s001     V  Alberto Franco     15/05/2002      35  street1   t1
1        s002     V    Gino Mcneill     17/05/2002      32  street2   t2
2        s003    VI     Ryan Parkes     16/02/1999      33  street3   t3
3        s001    VI    Eesha Hinton     25/09/1998      30  street1   t4
4        s002     V    Gino Mcneill     11/05/2002      31  street2   t5
5        s004    VI    David Parkes     15/09/1997      32  street4   t6

Sample Solution:

Python Code :

import pandas as pd
df = pd.DataFrame({
    'school_code': ['s001','s002','s003','s001','s002','s004'],
    'class': ['V', 'V', 'VI', 'VI', 'V', 'VI'],
    'name': ['Alberto Franco','Gino Mcneill','Ryan Parkes', 'Eesha Hinton', 'Gino Mcneill', 'David Parkes'],
    'date_of_birth': ['15/05/2002','17/05/2002','16/02/1999','25/09/1998','11/05/2002','15/09/1997'],
    'weight': [35, 32, 33, 30, 31, 32]},
     index = ['t1', 't2', 't3', 't4', 't5', 't6'])
print("Original DataFrame:")
print(df)
print("\nSet school code 's004' to 's005':")
df.at['t6', 'school_code'] = 's005'
print(df)
print("\nSet date_of_birth of 'Alberto Franco' to '16/05/2002':")
df.at['t1', 'date_of_birth'] = '16/05/2002'
print(df)

Sample Output:

Original DataFrame:
   school_code class            name date_of_birth  weight
t1        s001     V  Alberto Franco    15/05/2002      35
t2        s002     V    Gino Mcneill    17/05/2002      32
t3        s003    VI     Ryan Parkes    16/02/1999      33
t4        s001    VI    Eesha Hinton    25/09/1998      30
t5        s002     V    Gino Mcneill    11/05/2002      31
t6        s004    VI    David Parkes    15/09/1997      32

Set school code 's004' to 's005':
   school_code class            name date_of_birth  weight
t1        s001     V  Alberto Franco    15/05/2002      35
t2        s002     V    Gino Mcneill    17/05/2002      32
t3        s003    VI     Ryan Parkes    16/02/1999      33
t4        s001    VI    Eesha Hinton    25/09/1998      30
t5        s002     V    Gino Mcneill    11/05/2002      31
t6        s005    VI    David Parkes    15/09/1997      32

Set date_of_birth of 'Alberto Franco' to '16/05/2002':
   school_code class            name date_of_birth  weight
t1        s001     V  Alberto Franco    16/05/2002      35
t2        s002     V    Gino Mcneill    17/05/2002      32
t3        s003    VI     Ryan Parkes    16/02/1999      33
t4        s001    VI    Eesha Hinton    25/09/1998      30
t5        s002     V    Gino Mcneill    11/05/2002      31
t6        s005    VI    David Parkes    15/09/1997      32

For more Practice: Solve these Related Problems:

Write a Pandas program to update a particular cell in a DataFrame using the .loc accessor with a given index.
Write a Pandas program to set a new value for a cell identified by its index and column label, then display the modified row.
Write a Pandas program to modify a cell's value using the index and then compare the DataFrame before and after the update.
Write a Pandas program to use the .at accessor to change the value of a specific cell and then output the updated DataFrame.

Go to:

Previous: Write a Pandas program to create a dataframe and set a title or name of the index column.
Next: Write a Pandas program to convert index of a given dataframe into a column.

Python Code Editor:

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