ValueError:operation参数必须是str或unicode

时间:2017-05-07 08:31:22

标签: python unicode sqlite

我尝试使用python将一些数据库字段插入到SQLite DB中。我一直收到以下错误:

ValueError: operation parameter must be str

以下是我的代码。

import sqlite3

conn = sqlite3.connect("pass.db")
c = conn.cursor()

#Create table password
table_create_statement = "create table if not exists password(id integer primary key, site text, pass text);"
c.execute(table_create_statement)


#Promt user to input entry
sites = str(raw_input("Enter name of the sites: "))
password = str(raw_input("Enter password: "))

#SQL statement to insert the new entry
sql_statement = "insert into password values(?, ?, ?);",(None, sites, password)
c.execute((sql_statement))
connection.commit()
print("Password entered successfully")   

输出:

Enter name of the sites: www.google.com
Enter password: abcd
Traceback (most recent call last):
  File "pw.py", line 39, in <module>
    c.execute((sql_statement))
ValueError: operation parameter must be str or unicode

1 个答案:

答案 0 :(得分:7)

您需要将sql语句和参数作为单独的参数传递给execute()。你目前正在传递一个元组。

请改为:

sql_statement = "insert into password values(?, ?, ?);"
c.execute(sql_statement, (None, sites, password))

现在sql_statement是一个单独的字符串,参数作为第二个单独的参数传入。

请注意,raw_input()已经返回str个对象,无需再将其转换为str