[issue10954] No warning for csv.writer API change

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

Failing when passed a bytesIO object seems reasonable.
I question the bit about newlines though. The doc does not specify that newlines='' is needed on output. While is says it is needed for input, why? Why is a mix of '\n', '\r\n', and '\r' better than always '\n'?
It is not clear to me that the information is available to csv anyway.

----------
nosy: +terry.reedy
versions:  -Python 2.6

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10954>
_______________________________________