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
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
。