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Wed Sep 3 02:49:17 CEST 2008 · https://mail.python.org/pipermail/python-dev/2008-September/082160.html

Jesus Cea wrote:

> How do you differenciate between that empty string (when doing
> "read(0)"), from EOF (that is signaled by an empty string)?.

If you need to be able to make that distinction, then
you have to be careful not to try to read 0 bytes.

Personally I've never come across a situation where
allowing read(0) to occur would have simplified the
code. In the usual keep-reading-until-we've-got-the-
required-number-of-bytes scenario, you're checking
for 0 bytes left to read in order to tell when to
stop.

-- 
Greg

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[Python-Dev] fileobj.read(float): warning or error?