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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 apply_and_get_result(self, string):
 """ Perform the substitution represented by this object on string and return the result. """

        if self.is_multiline:
            compiled_pattern = re.compile(self.pattern, re.MULTILINE)
        else:
            compiled_pattern = re.compile(self.pattern)

        result = re.sub(compiled_pattern, self.repl, string)
        return result