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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 remove(self, source, delfiles=True):
 """Remove a dataset from the persist store source : str or DataSource or Lo If a str, this is the unique ID of the original source, which is the key of the persisted dataset within the store. If a source, can be either the original or the persisted source. delfiles : bool Whether to remove the on-disc artifact """

        source = self.get_tok(source)
        with self.fs.open(self.path, 'rb') as f:
            data = yaml.safe_load(f.read().decode())
        data['sources'].pop(source, None)
        with self.fs.open(self.path, 'wb') as fo:
            fo.write(yaml.dump(data, default_flow_style=False).encode())
        if delfiles:
            path = posixpath.join(self.pdir, source)
            try:
                self.fs.rm(path, True)
            except Exception as e:
                logger.debug("Failed to delete persisted data dir %s" % path)
        self._entries.pop(source, None)