pymysql에서 blob column에 Insert하는 방법

import pymysql

conn = pymysql.connect(host='host name or ip',user='user name',passwd='password',db='db name',charset='db의 charset')
cur = conn.cursor()
sql = 'insert into t1(c1,c2,c3) values(%s,%s,%s)'

with open(filename, 'rb') as file:
    binaryData = file.read()

#c1은 int, c2는 varchar(10), c3는 blob일 때
args = (1,'text',binaryData)

cur.execute(sql,args)
conn.commit()
conn.close()