help please

Question

Im trying to add a newline like "\n" in a code but i cant,so i wanted to know how can i index a newline in my code.
I was thinking like about use append but it did not change nothing.

file = open("/usercode/files/books.txt", "r")
leer=file.read()
lista=leer.split()
abreviatura=""
salto_linea="\n"
i=0
for i in lista:
i+=i
abreviatura+=i[0]
if i==2:
#here is where i want to put the part of newline

print(abreviatura)
file.close()

Answer 1

if you want to put a new line at index i, you could simply do:

text = file.read()
print(text[:i]+'\n'+text[i:])

Answer 2

or, to avoid doubling memory requirement in case of big files:

ext = file.read()
print(text[:i],text[i:],sep='\n')

Answer 3

Ohh thank you very much