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Showing content from http://mail.python.org/pipermail/python-list/2005-September/318223.html below:

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

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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

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