Exception wrapping is dumb

def unwrap_template_syntax_error(function, *unwrap_exceptions):
    """
    A decorator to catch TemplateSyntaxError and unwrap it, reraising the
    wrapped exception.

    If unwrap_exceptions are passed, the unwrapping will only occur if the
    wrapped exception is one of those exception types.

    """
    @wraps(function)
    def _wrapped(*args, **kwargs):
        try:
            return function(*args, **kwargs)
        except TemplateSyntaxError, e:
            wrapped = e.exc_info[1]
            if (not unwrap_exceptions or
                wrapped in unwrap_exceptions or
                isinstance(wrapped, unwrap_exceptions)):
                raise wrapped
            raise
    return _wrapped