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Groups > comp.lang.python > #3922

Re: Input() in Python3

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On Fri, Apr 22, 2011 at 10:08:20AM -0400, Mel wrote:
> Westley Martínez wrote:
> > On Fri, Apr 22, 2011 at 04:49:19PM +1000, Chris Angelico wrote:
> 
> >> Uhhhh.... NO. NO NO NO. What if someone enters "os.exit()" as their
> >> number? You shouldn't eval() unchecked user input!
> >> 
> >> Chris Angelico
> > 
> > Right, there's no way to check you're getting a number, however using:
> > 
> > a = int(input('enter a number > ')) # use float() for floats
> > 
> > will raise an exception if it can't convert the string.
> 
> But sys.exit() doesn't return a string.  My fave is
> 
> Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56) 
> [GCC 4.4.3] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import sys
> >>> a = int (input ('enter a number >'))
> enter a number >sys.setrecursionlimit(1)
> Exception RuntimeError: 'maximum recursion depth exceeded while calling a 
> Python object' in <type 'exceptions.RuntimeError'> ignored
> Exception RuntimeError: 'maximum recursion depth exceeded while calling a 
> Python object' in <type 'exceptions.RuntimeError'> ignored
> Error in sys.excepthook:
> RuntimeError: maximum recursion depth exceeded
> 
> Original exception was:
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> RuntimeError: maximum recursion depth exceeded while calling a Python object
> >>> int (0)
> Exception RuntimeError: 'maximum recursion depth exceeded while calling a 
> Python object' in <type 'exceptions.RuntimeError'> ignored
> Exception RuntimeError: 'maximum recursion depth exceeded while calling a 
> Python object' in <type 'exceptions.RuntimeError'> ignored
> Error in sys.excepthook:
> RuntimeError: maximum recursion depth exceeded
> 
> Original exception was:
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> RuntimeError: maximum recursion depth exceeded while calling a Python object
> >>> 
> 
> 
> 	Mel.
> 

What?

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Input() in Python3 harrismh777 <harrismh777@charter.net> - 2011-04-22 01:22 -0500
  Re: Input() in Python3 Chris Angelico <rosuav@gmail.com> - 2011-04-22 16:49 +1000
  Re: Input() in Python3 Chris Angelico <rosuav@gmail.com> - 2011-04-22 16:50 +1000
  Re: Input() in Python3 Chris Rebert <clp2@rebertia.com> - 2011-04-22 00:46 -0700
    Re: Input() in Python3 harrismh777 <harrismh777@charter.net> - 2011-04-23 20:03 -0500
  Re: Input() in Python3 Westley Martínez <anikom15@gmail.com> - 2011-04-22 06:52 -0700
    Re: Input() in Python3 Mel <mwilson@the-wire.com> - 2011-04-22 10:08 -0400
      Re: Input() in Python3 Chris Angelico <rosuav@gmail.com> - 2011-04-23 06:25 +1000
        Re: Input() in Python3 Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-04-22 23:55 +0000
          Re: Input() in Python3 Chris Angelico <rosuav@gmail.com> - 2011-04-23 10:07 +1000
      Re: Input() in Python3 Westley Martínez <anikom15@gmail.com> - 2011-04-23 12:33 -0700
        Re: Input() in Python3 Mel <mwilson@the-wire.com> - 2011-04-25 12:50 -0400

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