sys报错 IndexError: list index out of range

Question

Traceback (most recent call last):

  File "C:\Users\admin\Desktop\DBC23.py", line 69, in <module>

    source_acctid=sys.argv[1]

IndexError: list index out of range

>>> 

用sys写写银行转账例子错误

if __name__=="__main__":

    source_acctid=sys.argv[1]

    target_acctid=sys.argv[2]

    money =sys.argv[3]

    conn =pymysql.connec

‘