问题描述
我想从wsj.com抓取一些数据并打印出来.实际的网站是: https://www.wsj.com/market-data /stocks?mod = md_home_overview_stk_main ，数据为纽约证交所发行量上升，下降和纽约证交所交易量上升，下降.
I wanted to scrape some data from wsj.com and print it. The actual website is: https://www.wsj.com/market-data/stocks?mod=md_home_overview_stk_main and the data is NYSE Issues Advancing, Declining and NYSE Share Volume Advancing, Declining.
我在观看youtube视频后尝试使用beautifulsoup，但是我无法获得任何类来返回体内的值.
I tried using beautifulsoup after watching a youtube video but I can't get any of the classes to return a value inside body.
这是我的代码:
from bs4 import BeautifulSoup
import requests
source = requests.get('https://www.wsj.com/market-data/stocks?mod=md_home_overview_stk_main').text
soup = BeautifulSoup(source, 'lxml')
body = soup.find('body')
adv = body.find('td', class_='WSJTables--table__cell--2dzGiO7q WSJTheme--table__cell--1At-VGNg ')
print(adv)
在检查网络中的元素时，我注意到该数据也可以作为JSON使用.
Also while inspecting elements in Network I noticed that this data is also available as a JSON.
因此，我编写了另一个脚本，尝试使用JSON解析此数据，但同样无法正常工作.
So I wrote another script to try and parse this data using JSON but again its not working.
这是代码:
import json
import requests
url = 'https://www.wsj.com/market-data/stocks?id=%7B%22application%22%3A%22WSJ%22%2C%22marketsDiaryType%22%3A%22overview%22%7D&type=mdc_marketsdiary'
response = json.loads(requests.get(url).text)
print(response)
我得到的错误是:
File "C:\Users\User\Anaconda3\lib\json\decoder.py", line 355, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
JSONDecodeError: Expecting value
我还尝试了此链接似乎没有任何作用.
I also tried a few different methods from this link and none seem to work.
能否请我在正确的路径上设置如何抓取这些数据?
Can you please set me on the right path how to scrape this data?
推荐答案
from bs4 import BeautifulSoup
import requests
import json
params = {
'id': '{"application":"WSJ","marketsDiaryType":"overview"}',
'type': 'mdc_marketsdiary'
}
headers = {
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:73.0) Gecko/20100101 Firefox/73.0"
}
r = requests.get(
"https://www.wsj.com/market-data/stocks", params=params, headers=headers).json()
data = json.dumps(r, indent=4)
print(data)
输出:
{
"id": "{\"application\":\"WSJ\",\"marketsDiaryType\":\"overview\"}",
"type": "mdc_marketsdiary",
"data": {
"instrumentSets": [
{
"headerFields": [
{
"value": "name",
"label": "Issues"
}
],
"instruments": [
{
"name": "Advancing",
"NASDAQ": "169",
"NYSE": "69"
},
{
"name": "Declining",
"NASDAQ": "3,190",
"NYSE": "2,973"
},
{
"name": "Unchanged",
"NASDAQ": "24",
"NYSE": "10"
},
{
"name": "Total",
"NASDAQ": "3,383",
"NYSE": "3,052"
}
]
},
{
"headerFields": [
{
"value": "name",
"label": "Issues At"
}
],
"instruments": [
{
"name": "New Highs",
"NASDAQ": "53",
"NYSE": "14"
},
{
"name": "New Lows",
"NASDAQ": "1,406",
"NYSE": "1,620"
}
]
},
{
"headerFields": [
{
"value": "name",
"label": "Share Volume"
}
],
"instruments": [
{
"name": "Total",
"NASDAQ": "4,454,691,895",
"NYSE": "7,790,947,818"
},
{
"name": "Advancing",
"NASDAQ": "506,192,012",
"NYSE": "219,412,232"
},
{
"name": "Declining",
"NASDAQ": "3,948,035,191",
"NYSE": "7,570,377,893"
},
{
"name": "Unchanged",
"NASDAQ": "464,692",
"NYSE": "1,157,693"
}
]
}
],
"timestamp": "4:00 PM EDT 3/09/20"
},
"hash": "{\"id\":\"{\\\"application\\\":\\\"WSJ\\\",\\\"marketsDiaryType\\\":\\\"overview\\\"}\",\"type\":\"mdc_marketsdiary\",\"data\":{\"instrumentSets\":[{\"headerFields\":[{\"value\":\"name\",\"label\":\"Issues\"}],\"instruments\":[{\"name\":\"Advancing\",\"NASDAQ\":\"169\",\"NYSE\":\"69\"},{\"name\":\"Declining\",\"NASDAQ\":\"3,190\",\"NYSE\":\"2,973\"},{\"name\":\"Unchanged\",\"NASDAQ\":\"24\",\"NYSE\":\"10\"},{\"name\":\"Total\",\"NASDAQ\":\"3,383\",\"NYSE\":\"3,052\"}]},{\"headerFields\":[{\"value\":\"name\",\"label\":\"Issues At\"}],\"instruments\":[{\"name\":\"New Highs\",\"NASDAQ\":\"53\",\"NYSE\":\"14\"},{\"name\":\"New Lows\",\"NASDAQ\":\"1,406\",\"NYSE\":\"1,620\"}]},{\"headerFields\":[{\"value\":\"name\",\"label\":\"Share Volume\"}],\"instruments\":[{\"name\":\"Total\",\"NASDAQ\":\"4,454,691,895\",\"NYSE\":\"7,790,947,818\"},{\"name\":\"Advancing\",\"NASDAQ\":\"506,192,012\",\"NYSE\":\"219,412,232\"},{\"name\":\"Declining\",\"NASDAQ\":\"3,948,035,191\",\"NYSE\":\"7,570,377,893\"},{\"name\":\"Unchanged\",\"NASDAQ\":\"464,692\",\"NYSE\":\"1,157,693\"}]}],\"timestamp\":\"4:00 PM EDT 3/09/20\"}}"
}
这篇关于刮wsj.com的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！