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. -- http://mail.python.org/mailman/listinfo/python-list