Question

我在搜索数据库（SQLite3）时遇到现有值的问题。我认为问题是搜索值包含连字符。当我在数据库编辑器中使用“”和“'来尝试命令时，它正在工作，但似乎无法在我的代码中使用它。

如果有帮助，我添加了整个代码。不工作的部分是在之后，如果在Arbetsgivare类中re.findall（“[i | I] [t | T] - ”，str（i））。

from bs4 import BeautifulSoup
import requests
import re
import sqlite3

class Connect():

    def __init__(self):  
        global conn
        conn = sqlite3.connect('DBJobb.db')
        global cursor
        cursor = conn.cursor()
        print("DB successfully connected.")        
        try:
            conn.execute('''CREATE TABLE Annonser(TITLE TEXT NOT NULL, URL TEXT NOT NULL)''')
            print("The DB was created successfully.")
        except:
            print("The table already exists, no need to create it.")

class Arbetsgivare:

    def Polisen():
        url = requests.get('http://polisen.se/aktuellt/lediga-jobb')
        content = url.content
        soup = BeautifulSoup(content)
        added = 0
        notadded = 0

        for i in soup.find_all('a'):
            if re.findall("[i|I][t|T]\-", str(i)):
                #SELECT both with * and count(*)
                conn.execute("SELECT * FROM Annonser WHERE TITLE = ?", (i.get_text(),))
                search = cursor.fetchone() 
                print(search) #Just to see what the value it has.
                if search is None: #I have tried with == 0 as well.
                    conn.execute("INSERT INTO Annonser(TITLE, URL) values (?, ?)", ((i.get_text()), ('http://polisen.se'+i.get('href'))))
                    conn.commit()
                    added = added + 1
                else:
                    notadded = notadded + 1
        print(str(added)+" entries was added to the DB. There were "+str(notadded)+" entries found which was already in the DB.")

Connect()
Arbetsgivare.Polisen()

Answer 1

尝试使用引号

SELECT * FROM Annonser WHERE TITLE = 'searchstring'

Answer 2

好吧，我让它上班了。问题是括号和逗号并使用内容而不是get_text（）。这是工作代码。

for i in soup.find_all('a'):
            if re.findall("[i|I][t|T]\-", str(i)):
                var = str(i.contents)
                var = var.replace("[", "").replace("]", "").replace("'", "")
                cursor.execute("SELECT * FROM Annonser WHERE TITLE = ?", (var,))
                search = cursor.fetchone() 
                if search is None:
                    conn.execute("INSERT INTO Annonser(TITLE, URL) values (?, ?)", ((i.get_text()), ('http://polisen.se'+i.get('href'))))
                    conn.commit()
                    added = added + 1
                else:
                    notadded = notadded + 1
        print(str(added)+" entrie(s) was added from SKL to the DB.")

在DB中使用连字符搜索值（SQLite3）

2 个答案: