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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 build_dynamic(self, db, extra=None, safe_mode=False):
 """Builds the dynamic context based on our current dynamic context entity and the given database."""

        result = dict()
        for var, query in iteritems(self.dynamic):
            result[var] = db.query(query, safe_mode=safe_mode, additional_locals=extra)
        return result