print()

[mattia]

Il Fri, 16 Oct 2009 22:40:34 -0700, Dennis Lee Bieber ha scritto:

> On Fri, 16 Oct 2009 23:39:38 -0400, Dave Angel <davea at ieee.org>
> declaimed the following in gmane.comp.python.general:
> 
> 
>> You're presumably testing this in the interpreter, which prints extra
>> stuff.  In particular, it prints the result value of any expressions
>> entered at the interpreter prompt.  So if you type
>> 
>> sys.stdout.write("hello")
>> 
>> then after the write() method is done, the return value of the method
>> (5) will get printed by the interpreter.
>>
> 	I was about to respond that way myself, but before doing so I 
wanted
> to produce an example in the interpreter window... But no effect?
> 
> C:\Documents and Settings\Dennis Lee Bieber>python ActivePython 2.5.2.2
> (ActiveState Software Inc.) based on Python 2.5.2 (r252:60911, Mar 27
> 2008, 17:57:18) [MSC v.1310 32 bit (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import sys
>>>> sys.stdout.write("hello")
> hello>>>
> 
> 
> PythonWin 2.5.2 (r252:60911, Mar 27 2008, 17:57:18) [MSC v.1310 32 bit
> (Intel)] on win32.
> Portions Copyright 1994-2006 Mark Hammond - see 'Help/About PythonWin'
> for further copyright information.
>>>> import sys
>>>> sys.stdout.write("This is a test")
> This is a test
>>>> 
>>>> print sys.stdout.write("Hello")
> HelloNone
>>>> 
>>>> 
> 
> 	No count shows up... neither PythonWin or Windows command line/
shell

Indeed I'm using py3. But now everythong is fine. Everything I just 
wanted to know was just to run this simple script (I've also sent the msg 
'putchar(8)' to the newsgroup):

import time
import sys

val = ("|", "/", "-", "\\", "|", "/", "-", "\\")
for i in range(100+1):
    print("=", end="")
    # print("| ", end="")
    print(val[i%len(val)], " ", sep="", end="")
    print(i, "%", sep="", end="")
    sys.stdout.flush()
    time.sleep(0.1)
    if i > 9:    
        print("\x08"*5, " "*5, "\x08"*5, sep="", end="")
    else:
        print("\x08"*4, " "*4, "\x08"*4, sep="", end="")
print(" 100%\nDownload complete!")