Why text I/O must be buffered in python 3?

Question

Python 2 supported unbuffered text I/O. The same approach doesn't work in python 3. Why was unbuffered text I/O disabled? ``` > import sys > sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0) builtins.ValueError: can't have unbuffered text I/O ``` The binary still works fine: ``` > sys.stdout = os.fdopen(sys.stdout.fileno(), 'wb', 0) # works fine ```

Accepted Answer

This is an open bug, issue # 17404 (last update 2013-03-13): http://bugs.python.org/issue17404

Why text I/O must be buffered in python 3?

Solution

Problem