Unwanted run through else/if not loop

This is a small but crucial error because it affects the code where you have to give a specific 'not found message'....but the problem might also lie with the fact that i'm using csv files. In this code I specified that 'not found' must be printed only if the record is not found, but it keeps printing anyways.

CODE

import csv
with open('data.csv','w') as f:
    ans='y'
    while ans=='y':
        s=csv.writer(f)
        g=int(input("Enter GR number:"))
        n=input("Enter name:")
        m=float(input("Enter total marks:"))
        s.writerow([g,n,m])
        print()
        ans=input('Enter more?')
        
with open('data.csv','r') as f:
    print("SEARCHING FOR GR NUMBER")
    print()
    gr=int(input('Enter GR number to search:'))
    s=list(csv.reader(f))
    for i in s:
        if str(gr) in i:
            print(i)
    if str(gr) not in i:
        print('Record not found')

OUTPUT

Enter GR number:234
Enter name:Mia
Enter total marks:80

Enter more?y
Enter GR number:456
Enter name:Mark
Enter total marks:80

Enter more?n
SEARCHING FOR GR NUMBER

Enter GR number to search:234
['234', 'Mia', '80.0']
Record not found

I have even tried other methods to print not found...but the same error occurs anyways lol. Any help appreciated. Thanks!