Steven D'Aprano wrote: > On Fri, 02 Nov 2012 23:22:53 +0100, Peter Kleiweg wrote: > >> In Python 3.1 and 3.2 >> >> At start-up, the value of sys.stdin.newlines is None, which means, >> universal newline should be enabled. But it isn't. > > What makes you think it is not enabled?
$ python3 -c 'open("tmp.txt", "wb").write(b"a\nb\r\nc\rd")' This is the output with universal newlines: $ python3 -c 'print(open("tmp.txt").readlines())' ['a\n', 'b\n', 'c\n', 'd'] But this is what you get from stdin: $ cat tmp.txt | python3 -c 'import sys; print(sys.stdin.readlines())' ['a\n', 'b\r\n', 'c\rd'] With Peter Kleiweg's fix: $ cat tmp.txt | python3 -c 'import sys, io; print(io.TextIOWrapper(sys.stdin.detach(), newline=None).readlines())' ['a\n', 'b\n', 'c\n', 'd'] I think it's reasonable to make the latter the default. -- http://mail.python.org/mailman/listinfo/python-list