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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _find_config(self, config_file):
 """This method will check if the configuration file "exist" If it does NOT then the method will bail calling an IOError. :param config_file: ``str`` :return: ``str`` """

        msg = ('Configuration file [ %s ] was not found.' % self.filename)
        self.log.fatal(msg)
        raise IOError(msg)