Delete newline / return carriage in file output

Question

I have a wordlist that contains returns to separate each new letter. Is there a way to programatically delete each of these returns using file I/O in Python?

Edit

Answer 1

simply use, it solves the issue.

   string.strip("\r\n")

Answer 2

>>> string = "testing\n"
>>> string
'testing\n'
>>> string = string[:-1]
>>> string
'testing'

This basically says "chop off the last thing in the string" The : is the "slice" operator. It would be a good idea to read up on how it works as it is very useful.

EDIT

I just read your updated question. I think I understand now. You have a file, like this:

aqua:test$ cat wordlist.txt 
Testing

This

Wordlist

With

Returns

Between

Lines

and you want to get rid of the empty lines. Instead of modifying the file while you're reading from it, create a new file that you can write the non-empty lines from the old file into, like so:

# script    
rf = open("wordlist.txt")
wf = open("newwordlist.txt","w")
for line in rf:
    newline = line.rstrip('\r\n')
    wf.write(newline)
    wf.write('\n')  # remove to leave out line breaks
rf.close()
wf.close()

You should get:

aqua:test$ cat newwordlist.txt 
Testing
This
Wordlist
With
Returns
Between
Lines

If you want something like

TestingThisWordlistWithReturnsBetweenLines

just comment out

wf.write('\n')

Answer 3

Remove empty lines in the file:

#!/usr/bin/env python
import fileinput

for line in fileinput.input("wordlist.txt", inplace=True):
    if line != '\n':
       print line,

The file is moved to a backup file and standard output is directed to the input file.

Answer 4

You can use a string's rstrip method to remove the newline characters from a string.

>>> 'something\n'.rstrip('\r\n')
>>> 'something'

Answer 5

The most efficient is to not specify a strip value

'\nsomething\n'.split() will strip all special characters and whitespace from the string

Answer 6

'whatever\r\r\r\r\r\r\r\r\n\n\n\n\n'.translate(None, '\r\n')

returns

'whatever'