Insert line in a specfic line in a file

Question

I have a very simple question but I don't find the answer ...

I have a file (data.txt) it contains

A
B
C
D
E
F

I just want to make function to insert line where I want in this file.

Like : Insert('Bouh', 3)

Render :

A
B
C
D
Bouh
E
F

Any idea please ?

What does the second argument in your function `Insert()` refer to? — balkon16, Dec 18 '19 at 16:16

Oleg O · Answer 1 · 2019-12-18T16:26:53.633

0

UPD: '\n' is already included as the last symbol, so like this

lines = open('demo.txt', 'r').readlines()
position = 3
lines.insert('other line\n', position)
with open('demo.txt', 'w') as f:
    f.write(''.join(lines))

edited Dec 18 '19 at 16:26

answered Dec 18 '19 at 16:21

Oleg O

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Insert line in a specfic line in a file

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