Question

好吧，我通常是sqlite和python的新手，所以请保持友好=）我有一本简单的字典-

time = data[0]['timestamp']
price = data[0]['price']

myprice = {'Date':time,'price':price}

myprice看起来像这样（时间是时间戳）-

{'Date': 1553549093, 'price': 1.7686}

我现在想将数据添加到sqlite3数据库...所以我创建了这个-

#Create database if not exist...

db_filename = 'mydb_test.db'
connection = sqlite3.connect(db_filename)

#Get a SQL cursor to be able to execute SQL commands...

cursor = connection.cursor()

#Create table

sql = '''CREATE TABLE IF NOT EXISTS TEST
            (PID INTEGER PRIMARY KEY AUTOINCREMENT,
            DATE TIMESTAMP,
            PRICE FLOAT)'''

#Now lets execute the above SQL

cursor.execute(sql)


#Insert data in sql

sql2 =  ("INSERT INTO GBPCAD VALUES (?,?)", [(myprice['Date'],myprice['price'])])

cursor.execute(sql2)
cursor.commit()
connection.close()

但是执行此代码时，我得到ValueError: operation parameter must be str

我在做什么错了？

Answer 1

在insert中传递execute()语句的参数：

sql2 =  "INSERT INTO GBPCAD (DATE, PRICE) VALUES (?,?)"
cursor.execute(sql2, (myprice['Date'], myprice['price']))

还要在插入语句中包含列的名称。

将字典或列表添加到Sqlite3-给出错误操作参数必须为str

1 个答案: