How to add empty lines between lines in text.txt document?-CodePudding

The purpose of the code is to add an empty line between lines in text.txt document and write some words in those empty lines. I tried looping through every line but the file should be in read mode only;

iushnaufihsnuesa
fsuhadnfuisgadnfuigasdf
asfhasndfusaugdf
suhdfnciusgenfuigsaueifcas

This is a sample of text.txt document how can i implement this on this txt?

f = open("text.txt", 'w ')
for x in f:
f.write("\n Words between spacing")

f.close()

First i tried directly to just make a new line between each line and add couple of stuuf

I also thought of first making empty lines between each line and then add some words in the empty spaces but I didn't figure this out

CodePudding user response：

Ok, for files in the region of 200 lines long you can store the whole file as a list of strings and add lines when re-writing the file:

with open("text.txt", 'r') as f:
    data = [line for line in f]

with open("text.txt", 'w') as f:
    for line in data:
        f.write(line)
        f.write("Words between spacing\n")

CodePudding user response：

You can divide this operation in three steps. In the first one, you read all the lines from the file into a list[str] using f.readlines():

with open("text.txt", "r") as f: # using "read" mode
    lines = f.readlines()

Second is to join these lines inside the list using the "".join(...) function.

lines = "My line between the lines\n".join(lines)

On third step, write it down to the file:

with open("text.txt", "w") as f: # using "write" mode
    f.write(lines)

Also, you can use f.read() in conjunction with text.replace("\n", ...):

with open("text.txt", "r") as f:
    full_text = f.read()

full_text = full_text.replace("\n", "\nMy desirable text between the lines\n")

with open("text.txt", "w") as f:
    f.write(full_text)

Initial text:

iushnaufihsnuesa
fsuhadnfuisgadnfuigasdf
asfhasndfusaugdf
suhdfnciusgenfuigsaueifcas

Final text:

iushnaufihsnuesa
My desirable text between the lines
fsuhadnfuisgadnfuigasdf
My desirable text between the lines
asfhasndfusaugdf
My desirable text between the lines
suhdfnciusgenfuigsaueifcas