Writing to a file (python)

Question

     if data.find('!add') != -1:
       f = open('masters.txt', 'w')
       f.writelines(args, '\n')
       sck.send('PRIVMSG ' + chan + ' :' + ' added' + " " + args + '\r\n')
       f.close()

When I use this code it replaces the old data with the new data, how can I make it so that the new data doesnt replaced the old data but ends at the end of the file.

RTFM? http://docs.python.org/tutorial/inputoutput.html, section 7.2. — Matthew Iselin, Jan 17 '11 at 04:19

score 7 · Answer 1 · answered Jan 17 '11 at 04:03

7

use

f = open('masters.txt', 'a')

instead

EDIT: see here

answered Jan 17 '11 at 04:03

erbridge

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score 5 · Answer 2 · answered Jan 17 '11 at 04:03

5

f = open('masters.txt', 'a')

answered Jan 17 '11 at 04:03

waffle paradox

2,755
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score 0 · Answer 3 · answered Apr 04 '13 at 18:17

0

Opening the file in 'w' mode deletes everything and then writes new stuff. I've learned it the hard way ;)

Anyway, you should open it in 'a' mode (append), which would look like this:

f = open("masters.txt", 'a')
f.writelines(args, "\n")
f.close()

answered Apr 04 '13 at 18:17

Gloripaxis

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Writing to a file (python)

3 Answers3