From: akuchlin at cnri.reston.va.us (Andrew M. Kuchling)
Date: Mon, 19 Apr 1999 13:03:35 GMT
Subject: How to merge data in a existant file
In-Reply-To: <7feqbf$pr6$1@nnrp1.dejanews.com>
References: <7feqbf$pr6$1@nnrp1.dejanews.com>
Message-ID: <14107.10521.542022.542456@amarok.cnri.reston.va.us>
X-UID: 87                                                  

fquiquet at lemel.fr writes:
>I know how to write data in a new file :
>I don't know what is the function that permit to add data whithout erase
>existing data.

	Open the file in append mode, with a mode string of 'a' (or
'ab' for a binary file) instead of 'w'.

>>> f = open('test-file', 'w') ; f.write('abc\n') ; f.close()
>>> f = open('test-file', 'a') ; f.write('abc\n') ; f.close()
>>> open('test-file', 'r').read()
'abc\012abc\012'

-- 
A.M. Kuchling			http://starship.python.net/crew/amk/
The NSA regularly lies to people who ask it for advice on export control. They
have no reason not to; accomplishing their goal by any legal means is fine by
them. Lying by government employees is legal.
    -- John Gilmore