[Python-Dev] cpython: Closes issue 17467. Add readline and readlines support to (original) (raw)

Antoine Pitrou solipsis at pitrou.net
Wed Mar 20 08:09:29 CET 2013

On Tue, 19 Mar 2013 21:44:15 -0700 Michael Foord <fuzzyman at voidspace.org.uk> wrote:

mockopen makes it easy to put a StringIO in place if that's what you want. It's just a simple helper function for providing some known data along with the Mock api to make asserts that it was used correctly. It isn't presenting a full file-system. My suggestion to the implementor of the patch was that read / readline / readlines be disconnected - but the patch provided allows them to be interleaved and I saw no reason to undo that. If users want more complex behaviour (like universal newline support) they can use mockopen along with a StringIO.

This is not about complex behaviour but simply correct behaviour. For the record, universal newlines are enabled by default in Python 3:

with open("foo", "wb") as f: f.write(b"a\r\nb\rc\n") ... 7 with open("foo", "r") as f: print(list(f)) ... ['a\n', 'b\n', 'c\n']

Regards

Antoine.

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