(Python) How to make python program take a random line from a .txt file?

Question

Hello i am new to python and i would like your help So i just start learning and the first thing came on my mind is Why not edit a simlpe program ! Well i want to take a line (a username) and put it in an existing code

Here a part of the code

def getRandomUsername():
    username = 'Name_'
    for x in range(0,9):
            username = username + getRandomChar()
    return username

I want to pull from my .txt automatically a username and replace it with the hole thing any ideas ?

As i told im very new to this type of thing also sorry for my bad engls

--

Thanks Guys

This may have been answered before! http://stackoverflow.com/q/14924721/823470 Good luck with Python. — tar, Jul 28 '14 at 02:53
The accepted answer on that question is not really high quality in my opinion. — chthonicdaemon, Jul 28 '14 at 03:33
But the answer with the highest votes seem fine. Which is what you copy/pasted into this Q&A, so it's definitely a duplicate. — KurzedMetal, Jul 28 '14 at 03:48
In my defence, I just didn't expect the best answer to be at the bottom of the list. — chthonicdaemon, Jul 28 '14 at 04:13
@Donkey32, please ask a new question for the new problem rather than adding on to an existing one - the new error seems completely unrelated to this question. — chthonicdaemon, Jul 28 '14 at 04:14

score 1 · Accepted Answer · answered Jul 28 '14 at 03:17

1

If your text file is not particularly large, you can read the whole thing into memory and select a random one:

import random

# You can do this once in your program
lines = open('filename').read().splitlines()

# Whenever you need a new random line, you do this
randomline = random.choice(lines)

answered Jul 28 '14 at 03:17

chthonicdaemon

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In that case you could substitute open('filename').read().splitlines() with open('filename').readlines() – Trevor Merrifield Jul 28 '14 at 04:45
`splitlines` has the advantage that it consumes the newline character, which is probably what is wanted here. – chthonicdaemon Jul 28 '14 at 13:54

score 0 · Answer 2 · edited Apr 28 '17 at 19:04

0

This is for integer random that is shown testfile.txt

import random
file = open("testfile.txt","w")
file.write(str(random.randint(3,115)))
file.close()

edited Apr 28 '17 at 19:04

Mad Physicist

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answered Apr 28 '17 at 18:43

Alphard

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(Python) How to make python program take a random line from a .txt file?

2 Answers2