Programming

Following my OSX bash bug discovery the other week what about this baby.

Just to let you guys know, since my post Sinclair Spectrum days where it was impossible to do a syntax error I do a great deal of syntax juggling to see what works on the few languages that I know, and I have done it for years, a form of hacking if you like......

I found this and mentioned it to someone I know on a python list.
NOTE: The help in the second code snippet. It seems that the string length is printed to sys.stderr .
The guy said it was part of the standard library in Version 3.x.x, NOT in Version 2.7.x and lower.

This IS actually in Python 3.x's standard library!? <Shock!>

I don't know about the latest Python 3.6.1 as I have not installed it yet.
The use of Python's exit function here is none standard but it does NOT give an error.
INSTEAD it gives a return code of the string length.
Surely this HAS to be a bug?

Code:

Last login: Wed Jun  7 13:16:13 on ttys000
AMIGA:amiga~> python3.5
Python 3.5.2 (v3.5.2:4def2a2901a5, Jun 26 2016, 10:47:25) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> help(sys.stdout.write)

>>> sys.stdout.write("Hello World!\n")
Hello World!
13
>>> exit(sys.stdout.write("Hello World!\n"))
Hello World!
AMIGA:amiga~> echo "$?"
13
AMIGA:amiga~> _

OUCH!
The help(sys.stdout.write) on python3.5.x

Code:

Help on built-in function write:

write(text, /) method of _io.TextIOWrapper instance
    Write string to stream.
    Returns the number of characters written (which is always equal to
    the length of the string).
(END)

Comments anyone?

EDIT:
OSX 10.12.5, default bash terminal running Python 3.5.2 in interactive mode.