Python

Question

我尝试使用变量将数据放入 table，如您在下面的代码中所见。当我运行这段代码时，我得到以下错误：

我想要代码做的是，从我提供给函数的参数中获取数据 insert_data。然后使用通配符问号符号。获得使用变量作为数据的选项。不太确定这样做是否是最合适的方法。但它确实适用于其他场合。我只是不明白为什么它在这段代码中不起作用。

Traceback (most recent call last):
  File "{path}", line 65, in <module>
    insert_data()
  File "{path}", line 56, in insert_data
    query ("INSERT INTO computers (name, os, mac_addr) VALUES "
  File "{path}", line 8, in query
    cursor.execute(query, args)
sqlite3.InterfaceError: Error binding parameter 0 - probably unsupported type.

我的代码

import cgi
import sqlite3
from os import path, environ

def query(query, *args):
    db = sqlite3.connect(database)
    cursor = db.cursor()
    cursor.execute(query, args)
    resultaat = cursor.fetchall()
    db.commit()
    db.close()
    return resultaat

def database_create():
    if path.isfile(database) != True:
        query("CREATE TABLE 'computers' ('name' TEXT, 'os' TEXT, 'mac_addr' TEXT,"
                         "'create_date' timestamp DEFAULT current_timestamp)")
        query("CREATE TABLE 'data' ('computer_id' integer, 'mem_usage' float,"
                         "'cpu_usage' float, 'total_size' float, 'used_size' float, 'free_size' float,"
                         "'create_date' timestamp DEFAULT current_timestamp)")
        query("CREATE TABLE 'grafieken' ('name' TEXT, 'legend' TEXT)")
        query("CREATE TABLE 'gebruikers'('u_name' TEXT, 'p_word' TEXT)")
        query("INSERT INTO 'gebruikers' (u_name, p_word) VALUES ('beheerder',"
              "'695badbd075fdacd8638a600712f9aec74dd85b6ae61f7ab7f0f45e438196bf0aac117102d328e3d4e92fd5fc78f593a50875f900a7fe59f5d463bbf35af245c3b605ec3b6f91cbec7452801ca5ca95ebf00b248e73d07b9934d25ab21b6943a83d1944450854ef05044be01ff0d3b72b158209a70a28c3e063ec6a7f806d610')")
        query("INSERT INTO grafieken VALUES ('Totale hardeschijf ruimte', 'Ruimte (GB), hoger is beter')")
        query("INSERT INTO grafieken VALUES ('Beschikbare hardeschijf ruimte', 'Ruimte (GB), hoger is beter')")
        query("INSERT INTO grafieken VALUES ('Gebruikte hardeschijf ruimte', 'Ruimte (GB), lager is beter')")
        query("INSERT INTO grafieken VALUES ('Geheugenverbruik', 'Geheugen (%), lager is beter')")
        query("INSERT INTO grafieken VALUES ('CPU-verbruik', 'Processor (%), lager is beter')")
        print ('done')
    elif path.isfile(database) == True:
        print ('DB already exists')
    else:
        print('failed')

def insert_data():
    try:
        import psutil
    except ImportError:
        print('no psutil installed')
        exit(1)
    import platform
    import uuid

    diskspace = psutil.disk_usage('/')
    spacetoGB = [diskspace[0] // (2 ** 30), diskspace[1] // (2 ** 30), diskspace[2] // (2 ** 30)]  # Total, used, free
    name = platform.uname()[1],
    mac_addr = '%012x' % uuid.getnode(),  # 
    #totalsize = spacetoGB[0],
    #usedsize = spacetoGB[1],
    #freesize = spacetoGB[2],
    os = platform.system() + " " + platform.release(),
    # memusage = psutil.virtual_memory().percent,
    # cpu_usage = psutil.cpu_percent(interval=1)

    query ("INSERT INTO computers (name, os, mac_addr) VALUES "
           "(?,?,?)", *(name, os, mac_addr,))
    data = 'Record added'
    print (data)
    #return data


database = "tester.db"
database_create()
insert_data()

Answer 1

逗号 (,) 终止集合语句（例如 name = platform.uname()[1],）将变量转换为元组。

Python - 'sqlite3.InterfaceError: Error binding parameter 0 - probably unsupported type.' when insert data into table using sqlite3 python

Python - 'sqlite3.InterfaceError: Error binding parameter 0 - probably unsupported type.' when insert data into table using sqlite3 python

sqlite

python-3.x

python-3.9