[Python-ideas] Replacing the standard IO streams (was Re: changing sys.stdout encoding) (original) (raw)

Paul Moore p.f.moore at gmail.com
Sun Jun 10 22:38:14 CEST 2012

On 10 June 2012 21:28, MRAB <python at mrabarnett.plus.com> wrote:

On 10/06/2012 21:07, Paul Moore wrote:

On 10 June 2012 20:01, MRAB<python at mrabarnett.plus.com>  wrote:

 On 10/06/2012 19:34, Paul Moore wrote:

 On 10 June 2012 19:12, MRAB<python at mrabarnett.plus.com>    wrote:

On 10/06/2012 17:41, Stephen J. Turnbull wrote:

I am a little concerned with MRAB's report that import sys print("hello") sys.stdout.flush() sys.stdout = open(sys.stdout.fileno(), 'w', encoding='utf-8') print("hello") doesn't work as expected, though.  (It does work for me on Mac OS X, both as above -- of course there are no '\r's in the output -- and with 'print("hello", end="\r\n")'.) That's actually Python 3.1. From Python 3.2 it's slightly different, but still not quite right: Python 3.1:     "hello\r\nhello\r\r\n" Python 3.2:     "hello\nhello\r\n" Python 3.3.0a4: "hello\nhello\r\n" All on Windows.  Not here (Win 7 32-bit):  PS D:\Data>    type t.py  import sys  print("Hello!")  sys.stdout.flush()  sys.stdout = open(sys.stdout.fileno(), 'w', encoding='utf-8')  print("Hello!")  PS D:\Data>    py -3.2 t.py | od -c  0000000   H   e   l   l   o   !  \r  \n   H   e   l   l   o   !  \r  \n  0000020  I'm using Windows XP Pro (32-bit), initially sys.stdout.encoding ==  "cp1252". PS D:\Data>  py -3 -c "import sys; print(sys.stdout.encoding)" cp850 This is at the console (Powershell) - are you running from within something like idle, or a GUI environment? It's at the system command prompt. When I redirect the script's stdout to a file (on the command line using ">output.txt") I get those 15 bytes from Python 3.2. Your output appears to be 32 bytes (the second line starts with "0000020").

Well spotted - PowerShell does funny things with Unicode in pipes, I'd forgotten. Indeed, I get the same output as you from cmd.

Odd. Paul

More information about the Python-ideas mailing list