Set value for particular cell in Pandas DataFrame using index

Example:

# Importing pandas package
import pandas as pd

# Creating a dictionary
d = {
    "Name":['Hari','Mohan','Neeti','Shaily'],
    "Age":[25,36,26,21],
    "Gender":['Male','Male','Female','Female'],
    "Profession":['Doctor','Teacher','Singer','Student']
}

# Now, we will create DataFrame
df = pd.DataFrame(d)

# Printing the original DataFrame
print("Original DataFrame:\n")
print(df,"\n\n")

# Now, we will change the cell value
# In the name column, we will change the value 
# from Shaily to Astha
# For this we need to pass its row number i.e. 
# index and also the column name.
df.at[3,'Name'] = 'Astha'

# Now, Printing the modified DataFrame
print("Modified DataFrame:\n")
print(df)

Output:

Original DataFrame:

     Name  Age  Gender Profession
0    Hari   25    Male     Doctor
1   Mohan   36    Male    Teacher
2   Neeti   26  Female     Singer
3  Shaily   21  Female    Student 


Modified DataFrame:

    Name  Age  Gender Profession
0   Hari   25    Male     Doctor
1  Mohan   36    Male    Teacher
2  Neeti   26  Female     Singer
3  Astha   21  Female    Student