Loop through unlimited multiline input

Question

Imagine unlimited multiline input with some URL addresses, for example:

How would you get that addresses from the input separately?

Following was close, but actually not helping:

lines = []
while True:
    line = input()
    if line:
        lines.append(line)
    else:
        break
text = '\n'.join(lines)

source: How to get multiline input from user

And other advices I consider completely useless: https://python.plainenglish.io/taking-multiple-inputs-from-user-in-python-3-6cbe02d03a95

Either you do the processing of lines (per line) inside the loop, or you have to provide some way for the user to terminate the input. How would you otherwise know when to stop reading input? — agtoever, Jul 07 '22 at 17:50
"Following was close, but actually not helping" ...in what way? are you able to explain what you actually want? — Anentropic, Jul 07 '22 at 17:59
@pavel What is the source of input? Is it interactive, streamed or something else? — DarkKnight, Jul 08 '22 at 04:53

score 0 · Answer 1 · answered Jul 07 '22 at 17:50

0

If I understand the problem correctly, this may help:

lines = []
try:
    while line := input():
        lines.append(line)
except EOFError:
    pass
print(lines)

This will handle both interactive and redirected input (stdin)

answered Jul 07 '22 at 17:50

DarkKnight

19,739
3
6
22

The problem is, that while loop will start over again with new input request. – pavel Jul 07 '22 at 18:39
This works exactly as requested. You could copy and paste, or enter free text. Not sure what issue you are having here. – chitown88 Jul 08 '22 at 08:26

score 0 · Answer 2 · answered Jul 07 '22 at 17:51

0

There is a function you could use:

import sys
sys.stdin.read()

But I'm not sure this is a great idea because it won't know when to stop reading. The traditional input() function will detect a \n symbol via the return key, then end input.

I think looping would be the best way forward.

Like:

urls = ''

while True:
    url = input()
    
    if url:
        urls += url + '\n'
    else:
        break

Have a nice day.

answered Jul 07 '22 at 17:51

Jude Davis

98
1
5

The problem is, that while loop will start over again with new input request. – pavel Jul 08 '22 at 04:45
No. Once it detects an empty lines IE just press enter twice when you’re done, then it will exit out of the input. – Jude Davis Jul 08 '22 at 09:03

Loop through unlimited multiline input

2 Answers2