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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 parse(self):
 """ Parses format string looking for substitutions This method is responsible for returning a list of fields (as strings) to include in all log messages. """

        standard_formatters = re.compile(r'\((.+?)\)', re.IGNORECASE)
        return standard_formatters.findall(self._fmt)