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Mon Jan 27 11:55:22 CET 2014 · https://mail.python.org/pipermail/python-dev/2014-January/132130.html

2014-01-27 Antoine Pitrou <solipsis at pitrou.net>:
> On Mon, 27 Jan 2014 10:45:37 +0100
> Victor Stinner <victor.stinner at gmail.com> wrote:
>>
>> - Tulip #111: StreamReader.readexactly() now raises an
>> IncompleteReadError if the
>> end of stream is reached before we received enough bytes, instead of returning
>> less bytes than requested.
>
> Why not simply EOFError?

IncompleteReadError has two additionnal attributes:

- partial: "incomplete" received bytes
- expected: total number of expected bytes (n parameter of readexactly)

I prefer to use a different exception to ensure that these attributes
are present. I don't like having to check "hasattr(exc, ...)".

Before this change, readexactly(n) returned the partial received bytes
if the end of the stream was reached.

Victor

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