6月6日

今天开始实现顶会热词。但是面对这个题目束手无策，我不知道怎么去爬取数据。在网上找到了学长以前的代码，拿过来进行尝试。

import requests
import pymysql
from bs4 import BeautifulSoup

db = pymysql.connect(host='127.0.0.1',

                     user='root',
                     password='root',
                     db='ding',
                     charset='utf8')

cursor = db.cursor()

headers = {
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36"
}
url = "http://openaccess.thecvf.com/CVPR2019.py?day=2019-06-20"
html = requests.get(url)

soup = BeautifulSoup(html.content, 'html.parser')

soup.a.contents == 'pdf'

pdfs = soup.findAll(name="a", text="pdf")

lis = []
jianjie = ""
print(pdfs)
print("1111111111111111")
for i, pdf in enumerate(pdfs):

    pdf_name = pdf["href"].split('/')[-1]
    name = pdf_name.split('.')[0].replace("_CVPR_2019_paper", "")

    link = "http://openaccess.thecvf.com/content_CVPR_2019/html/" + name + "_CVPR_2019_paper.html"
    url1 = link
    html1 = requests.get(url1)
    soup1 = BeautifulSoup(html1.content, 'html.parser')
    weizhi = soup1.find('div', attrs={'id': 'abstract'})
    if weizhi:
        jianjie = weizhi.get_text();
    print("这是第" + str(i) + "条数据")
    keyword = str(name).split('_')
    keywords = ''
    for k in range(len(keyword)):
        if (k == 0):
            keywords += keyword[k]
        else:
            keywords += ',' + keyword[k]
    info = {}
    info['title'] = name
    #print("这是第" + name + "条数据")
    info['abstract'] = jianjie
    info['link'] = link
    info['keywords'] = keywords
    lis.append(info)

cursor = db.cursor()
for i in range(len(lis)):
    cols = ", ".join('`{}`'.format(k) for k in lis[i].keys())
    print(cols)  # '`name`, `age`'

    val_cols = ', '.join('%({})s'.format(k) for k in lis[i].keys())
    print(val_cols)  # '%(name)s, %(age)s'

    sql = "insert into lunwen(%s) values(%s)"
    res_sql = sql % (cols, val_cols)
    print(res_sql)

    cursor.execute(res_sql, lis[i])  # 将字典a传入
    db.commit()
    num = 1
    print(num)
    print("成功")


但是多次运行没有修改成功，运行后没有反应。