Re: Suggestion for "syntax error": ++i, --i

[Steven Bethard]

Peter Maas wrote:
target = 'a='
sign = '-'
operand = '-2'
exec(target+sign+operand)
Hopefully not too many people write code like above when it isn't much 
harder to write this without exec:

>>> target = 'a'
>>> sign = '-'
>>> operand = '-2'
>>> sign_functions = {'+':operator.pos, '-':operator.neg}
>>> globals()[target] = sign_functions[sign](int(operand))
>>> a
2
This avoids fun with exec like:
target = 'a='
sign = '-'
operand = '-2; import os; os.removedirs("/")'
=)
Steve
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