Method exists

db.py:31–34

(self, vname, table, value)

		self.conn.commit()

	def exists(self, vname, table, value):
		sql = f"SELECT {vname} FROM {table} WHERE {vname} = (?)"
		self.cur.execute(sql, (value,))
		return self.cur.fetchone() is not None

	def reset(self):
		self.close()