在SQLite中輸入數據

我正在使用一個項目，並啓動了一個小型項目以通過串行獲取一些數據。數據通過串行傳輸，但沒有任何內容被添加到數據庫中。表格被創建，但不是實際的數據被推送。那裏出了點問題。在SQLite中輸入數據

這裏是我的代碼：

#!/usr/bin/env python 
import serial 
import time 

import sqlite3 
import os 
from datetime import datetime 

conn = sqlite3.connect("elements78.db") # or use :memory: to put it in RAM 

cursor = conn.cursor() 
sql_file = os.path.join(os.path.dirname(__file__), 'elements78.db') 
needs_creation = not os.path.exists(sql_file) 
db_connection = sqlite3.connect(sql_file) 
db_connection.row_factory = sqlite3.Row 

# create a table 
if needs_creation: 
    print 'Creating initial database...' 
    cursor = db_connection.cursor() 

    db_connection.commit() 
    print 'Database created.' 

cursor.executescript(""" 
        DROP TABLE IF EXISTS elements; 
        CREATE TABLE elements (id INTEGER PRIMARY KEY AUTOINCREMENT, Name, date CURDATE) 
        """) 

#enter your device file 
arddev = '/dev/tty.usbmodem621' 
baud = 9600 

#setup - if a Serial object can't be created, a SerialException will be raised. 
while True: 
    try: 
     ser = serial.Serial(arddev, baud) 

     #break out of while loop when connection is made 
     break 
    except serial.SerialException: 
     print 'waiting for device ' + arddev + ' to be available' 
     time.sleep(3) 

#read lines from serial device 
count = 0 
while count < 5: 

    element = ser.readline().strip('\n') 
    count = count + 1 
    datestamp = datetime.now() 
    print 'received the element: ' + element 
    print datestamp 

    cursor.execute('insert into elements(Name) values("%s")'%(element)) 


allentries = [] 
cursor.execute('SELECT * FROM elements') 

allentries=cursor.fetchall() 

print allentries

來源

2013-03-13 user2164689

也許這可能會給你一些建議http://zetcode.com/db/sqlitepythontutorial/ – Mingebag 2013-03-13 09:39:50

我*真的很真*建議你使用'sqlalchemy'包 – 2013-03-13 09:42:55

Jakub M的好建議，sqlalchemy會讓你的生活變得更加美好在這種情況下更容易，它也是一個ORM！ – theBigChalk 2013-03-13 22:39:30

嘗試增加

db_connection.commit()

你的INSERT語句後

。

來源

2013-03-13 09:38:34 djc

在SQLite中輸入數據

回答

相關問題