Martin v. Löwis <mar...@v.loewis.de> added the comment:

Without looking at the code, it seems that

http://docs.python.org/release/3.1.5/library/io.html?highlight=io#io.TextIOWrapper

gives the answer

"If line_buffering is True, flush() is implied when a call to write contains a 
newline character."

So, "line buffering" may have a meaning only for writing. I don't think there 
is a reasonable way to implement it for reading.

----------
nosy: +loewis

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