Read and Write the same file

[Cameron Laird]

In article <mailman.7168.1178062083.32031.python-list at python.org>,
Ian Clark <turbana at gmail.com> wrote:
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>the file, overwriting the oringinal copy. Now, this only really works
>if you're dealing with small files.
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On modern hosts (and I persist in using WinNT on a 133 MHz machine)
"small" here can easily mean, "up to 20 megabytes".