Is there any difference between print 3 and print '3' in Python ?
Terry Reedy
tjreedy at udel.edu
Mon Sep 10 03:16:48 EDT 2012
On 9/10/2012 2:33 AM, Dwight Hutto wrote:
>
>
> On Sun, Sep 9, 2012 at 10:41 AM, Ian Foote <ian at feete.org
> <mailto:ian at feete.org>> wrote:
>
> On 09/09/12 14:23, iMath wrote:
>
> 在 2012年3月26日星期一UTC+8下午7时45分26秒,__iMath写道:
>
> I know the print statement produces the same result when
> both of these two instructions are executed ,I just want to
> know Is there any difference between print 3 and print '3'
> in Python ?
>
> thx everyone
>
>
> Here's a future import though I used,so I can use the planned 3 with a
> 2x python version in the command line interpreter:
>
> Microsoft Windows [Version 6.1.7600]
> Copyright (c) 2009 Microsoft Corporation. All rights reserved.
>
> C:\Users\david>c:\python26\python.exe
> Python 2.6.6 (r266:84297, Aug 24 2010, 18:46:32) [MSC v.1500 32 bit
> (Intel)] on
> win32
> Type "help", "copyright", "credits" or "license" for more information.
> >>> exit()
>
> C:\Users\david>c:\python27_64\python.exe
> Python 2.7.2 (default, Jun 12 2011, 14:24:46) [MSC v.1500 64 bit
> (AMD64)] on win
> 32
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import __future__
> >>> x = 3
> >>> y = '3'
> >>> print(x)
> 3
> >>> print(y)
> 3
> >>>
> >>> type(x)
> <type 'int'>
> >>> type(y)
> <type 'str'>
>
> >>> z = '%i' % (3)
> >>> type(z)
> <type 'str'>
> >>>
>
> In other words type(value), and find out the difference.
print(x) prints str(x), which is meant to be a 'friendly'
representation. To see a difference,
>>> print(repr(3))
3
>>> print(repr('3'))
'3'
--
Terry Jan Reedy
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