Python SQLite3插入返回沒有錯誤，但表中沒有數據

Question

我需要你的建議和幫助。

我正在編寫一個代碼來解析區域的名稱和從某個網站的相應區域的鏈接。之後，我想將區域的名稱和鏈接存儲在數據庫中（sqlite3）。數據庫已創建，表已創建，但數據無法插入到表中。我嘗試了一些試驗和錯誤，但都沒有奏效。所以，我做了這個線程。

這裏是我的代碼：

''' 
usage python capstonePy.py http://www.liverpoolfc.com/fans/lfc-official-supporters-clubs 

URL: http://www.liverpoolfc.com/fans/lfc-official-supporters-clubs 

Official supporters URL pattern: 
http://www.liverpoolfc.com/fans/lfc-official-supporters-clubs/[region] 
''' 

from sys import argv 
from os.path import exists 
from BeautifulSoup import * 
import urllib 
import re 
import sqlite3 

class FindSupporters: 

    def __init__(self, *args, **kwargs): 
     #parsing the url from the command line  
     url = argv[1] 

     #make a new database 
     cur = new_db('liverpudlian.sqlite3') 

     #open and read the url  
     fhand = open_and_read(url) 

     #print how many characters have been retrieved 
     suc_ret(len(fhand)) 

     #make a list of links (href) 
     linklst = find_link(fhand) 

     #make a list of supporters regions 
     offsuplinklst = fans_link(linklst) 

     #make a new table and insert the data 
     officialsup_table(cur, offsuplinklst, 'liverpudlian.sqlite3') 

     sqlite3.connect('liverpudlian.sqlite3').close()  

def new_db(name): 
    conn = sqlite3.connect(name) 
    cur = conn.cursor() 
    return cur 

def open_and_read(url): 
    try:  
     fhand = urllib.urlopen(url).read() 
    except: 
     print '\n' 
     print "+------------------------------------------------------------------------------+" 
     print "|\t\t\t\tError: URL not found.\t\t\t\t|" 
     print "+------------------------------------------------------------------------------+" 
     print '\n'  
     quit() 
    return fhand 

def suc_ret(length): 
    print '\n' 
    print "+------------------------------------------------------------------------------+" 
    print "|\t\t", length, "characters have been successfully retrieved\t\t|" 
    print "+------------------------------------------------------------------------------+" 
    print '\n' 

def find_link(fhand): 
    links = [] 
    tags = [] 
    soup = BeautifulSoup(fhand) 
    tags = soup('a') 
    for tag in tags: 
     tag = tag.get('href',None) 
     if tag is not None : 
      links.append(tag) 
    return links 

def fans_link(linklst): 
    offsuplinklst = [] 
    for link in linklst: 
     link = str(link)   
     link = link.rstrip() 
     fans = re.findall('.*fans/.+clubs/(.+)', link) 
     if len(fans) > 0: 
      offsuplinklst.append(fans[0]) 
    return offsuplinklst 

def officialsup_table(cur, offsuplinklst, name): 
    cur.execute(''' 
    create table if not exists OfficialSup 
    (ID integer primary key, 
    Region text unique, 
    Link text unique, 
    Retrieved integer)''') 
    cur.execute('select Region from OfficialSup where Retrieved = 1 limit 1') 
    try : 
     cur.fetchone()[0]' 
    except :   
     for i in range(len(offsuplinklst)): 
      reg = offsuplinklst[i] 
      link = 'http://www.liverpoolfc.com/fans/lfc-official-supporters-clubs/'+offsuplinklst[i]    
      cur.execute('insert into OfficialSup (Region, Link, Retrieved) values (?, ?, 1)', (reg, link)) 
    sqlite3.connect(name).commit() 

FindSupporters() 

大概在officialsup_table方法的錯誤。儘管如此，我的嘗試並沒有帶來好的結果。

非常感謝！

問候， 阿諾德A.

Answer 1

您需要使用您的光標被創建在同一個連接實例承諾提高new_db返回兩個conn和cur：

def new_db(name): 
    conn = sqlite3.connect(name) 
    cur = conn.cursor() 
    return conn, cur 

您需要現在以不同的方式讀取功能的結果：

class FindSupporters: 

    def __init__(self, *args, **kwargs): 
     #parsing the url from the command line  
     url = argv[1] 

     #make a new database 
     conn, cur = new_db('liverpudlian.sqlite3') 

     # ... 

傳遞連接ction對象到officialsup_table功能以及和呼叫commit()：

def officialsup_table(conn, cur, offsuplinklst, name): 
    cur.execute(''' 
    create table if not exists OfficialSup 
    (ID integer primary key, 
    Region text unique, 
    Link text unique, 
    Retrieved integer)''') 
    conn.commit() 

    cur.execute('select Region from OfficialSup where Retrieved = 1 limit 1') 
    try : 
     cur.fetchone()[0] 
    except :   
     for i in range(len(offsuplinklst)): 
      reg = offsuplinklst[i] 
      link = 'http://www.liverpoolfc.com/fans/lfc-official-supporters-clubs/'+offsuplinklst[i]    
      cur.execute('insert into OfficialSup (Region, Link, Retrieved) values (?, ?, 1)', (reg, link)) 
    conn.commit()