srtring to int question

[Darrell Gallion]

"Bernhard Herzog"  wrote:
> Using assert for this is a bad idea. Assert statements will be omitted
> if the code is optimized (Python's -O option). They're meant to check
> internal program state and invariants, not to validate user input.
>
Your right.

import re, sys
globalNames={'hex':__builtins__.hex, 'int':__builtins__.int,
'raw_input':__builtins__.raw_input}
def convert(s):
    try:
        exec(s,globalNames, globalNames)
        return globalNames.get("x",None)
    except:
        import traceback
        traceback.print_exc ()

def convert1(s):
    if re.match("(\s*[-+*\\=]?\s*\d+\.?\d*\s*)+",s):
        try:
            return eval(s,globalNames, globalNames)
        except:
            import traceback
            traceback.print_exc ()


> The regex used has a bug, btw. It doesn't allow signs, e.g. "-1" will
> not be matched.
>
Not a bug, since Julian dates can't be negative. These instant code examples
are nice distractions from the hard problems I supposed to be working on :)

--Darrell