import pymysql

conn = pymysql.connect(host="******", user="******", password="******", db="******")

def test(table):
	print(f"SELECT * FROM {table} WHERE pid NOT IN (")
	pids = []
	with conn.cursor() as cur:
		cur.execute(f"SELECT pid FROM {table}")
		for r in cur:
			pids.append(r[0])
		cur.close()

	error_count = 0
	for pid in pids:
		with conn.cursor() as cur:
			try:
				cur.execute(f"SELECT * FROM {table} WHERE pid = %s", (pid,))
				r = cur.fetchone()
			except:
				print(f"{pid},", end="")
				error_count += 1
				if error_count == 20:
					print()
			finally:
				cur.close()

	print("-1);\n")

try:
	test("student_photos")
finally:
	conn.close()