Python網頁抓取。 xpath返回一個空的數組

我使用Python與請求和lxml從Craigslist搜索返回價格數組。當我運行代碼時，會打印一個空白數組。我嘗試了幾個不同的xpath，但都沒有工作。Python網頁抓取。 xpath返回一個空的數組

編輯：我添加了其餘的代碼，包括函數被調用的地方。

from tkinter import * 
import requests 
from lxml import html 

window = Tk() 
window.title('Craigslist Apartment Finder') 
window.resizable(width=False, height=True) 

def getSearch(): 
    s1 = searchterm1.get() 
    s2 = searchterm2.get() 
    s3 = searchterm3.get() 

    if s1 != "": 
     url = "https://newyork.craigslist.org/search/brk/roo?sort=date&availabilityMode=0&query=" + s1 
    if s2 != "": 
     url = url + "+" + s2 
    if s3 != "": 
     url = url + "+" + s3 
    if s1 != "" or s2 != "" or s3 != "": 
     print(url) 
    else: 
     print("No search terms entered.") 

    page = requests.get(url) 
    print(page) 
    tree = html.fromstring(page.content) 

    price = tree.xpath('//span[class="result-price"]/text()') 

    print("Prices:", price) 

searchterm1 = Entry(window) 
searchterm2 = Entry(window) 
searchterm3 = Entry(window) 

programname = Label(window, text="Apartment Finder") 
runbutton = Button(window, text="Run", bg="green", fg="white", width=10, command=getSearch) 

displayurl = Label(window, text="url") 
programname.grid(row=0, column=0, columnspan=2) 
runbutton.grid(row=0, column=2) 
searchterm1.grid(row=1, column=0) 
searchterm2.grid(row=1, column=1) 
searchterm3.grid(row=1, column=2) 
displayurl.grid(row=2, column=0, columnspan=3) 

window.mainloop()

來源

2017-02-12 PanczerTank

你能否提供你正在運行的整個代碼，或測試案例？現在我看到的只是一個沒有被調用的函數。 – galfisher

發表示例url –

新增所有代碼@galfisher – PanczerTank

//span[@class="result-price"]

添加@的屬性

來源

2017-02-12 02:47:30

Python網頁抓取。 xpath返回一個空的數組

回答

相關問題