.truncate()

The .truncate() file method allows the user to resize the file to a given number of bytes when the file is accessed through the append mode.

file.truncate(n)

Use .truncate() to change the size of the gullivers_travels.txt file from 603,908 bytes to 100:

f = open("gullivers_travels.txt", "a")

f.truncate(100)
f.close()

f = open("gullivers_travels.txt", "r")

print(f.read())