sqlite python执行delete报错

#coding=gbk 

from sqlite3 import dbapi2

 

# 打开数据库 c:\mytest.db 
conn=dbapi2.connect("c:\\mytest.db")
# 创建数据表 mytb 
sql1 = "CREATE TABLE IF NOT EXISTS mytb1 ( a char , b int , c real )"
sql2 = "CREATE TABLE IF NOT EXISTS mytb2 ( a char , b int , c real )"
sql3 = "CREATE TABLE IF NOT EXISTS mytb3 ( a char , b int , c real )"
conn.execute( sql1 )  
conn.execute( sql2 ) 
conn.execute( sql3 )  

cs = conn.cursor( )  

cs.execute("SELECT name FROM sqlite_master WHERE type='table'")
records = cs.fetchall()
for i in range(len(records)):
    print 'i:',i
    print 'records:',records[i][0]
   
    #cs.execute("DELETE FROM  %s  " % records[i][0])
    cs.execute('delete from ?' ,records[i][0])

    conn.commit()
 
cs.close()
conn.close() 

 

 

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sqlite3.OperationalError: near "?": syntax error