在 2012年3月26日星期一UTC+8下午8时11分03秒，Dave Angel写道： > On 03/26/2012 07:45 AM, redstone-c...@163.com wrote: > > 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 ? > > This is a non-question. The input is the same, the output is the same, > what else matters? > > On the other hand, if you want to dig deeper, there are lots of differences: > > 1) the former has a shorter source file > 2) different C code is utilized inside the interpreter > 3) different machine code executes > 4) the temporary objects created have different id's and types > 5) different execution times (by a trivial amount) > 6) it takes different keystrokes to edit the two source files once you > want to make it do something useful > 7) the processor works a little harder on one than the other, possibly > resulting in a different power consumption > 8) different byte code is produced > > Or you could be asking about Python version 3, in which case > 1) the syntax error message points to a different character > > -- > > DaveA
在 2012年3月26日星期一UTC+8下午8时11分03秒，Dave Angel写道： > On 03/26/2012 07:45 AM, redstone-c...@163.com wrote: > > 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 ? > > This is a non-question. The input is the same, the output is the same, > what else matters? > > On the other hand, if you want to dig deeper, there are lots of differences: > > 1) the former has a shorter source file > 2) different C code is utilized inside the interpreter > 3) different machine code executes > 4) the temporary objects created have different id's and types > 5) different execution times (by a trivial amount) > 6) it takes different keystrokes to edit the two source files once you > want to make it do something useful > 7) the processor works a little harder on one than the other, possibly > resulting in a different power consumption > 8) different byte code is produced > > Or you could be asking about Python version 3, in which case > 1) the syntax error message points to a different character > > -- > > DaveA Oh ,God ! I think this is what I really want to know ,thank you very much ! -- http://mail.python.org/mailman/listinfo/python-list
