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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 getdir(self, section, option, raw=False, vars=None, fallback="", validate=False):
 """ A convenience method which coerces the option in the specified section to a directory. """

        v = self.get(section, option, raw=raw, vars=vars, fallback=fallback)
        v = self._convert_to_path(v)
        return v if not validate or os.path.isdir(v) else fallback