How to use writelines to append new lines to an existing file

[Tom Brown]

On Thursday 22 September 2005 05:52, Nico Grubert wrote:
> Does  f = open('/tmp/myfile', 'w')  overwrite the existing file or
> does f.writelines('456') replace the first line in the existing file?

Here's an excerpt from open.__doc__

   The mode can be 'r', 'w' or 'a' for reading (default),
    writing or appending.  The file will be created if it doesn't exist
    when opened for writing or appending; it will be truncated when
    opened for writing.


Tom