import pandas as pd
from bs4 import BeautifulSoup
from lxml import etree
import time
import pymysql
from sqlalchemy import create_engine
from urllib.parse import urlencode # 编码 URL 字符串
start_time = time.time() #计算程序运行时间
def get_one_page(i):
try:
headers = {
'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36'
}
paras = {
'reportTime': '2017-12-31',
#可以改报告日期，比如2018-6-30获得的就是该季度的信息
'pageNum': i #页码
}
url = 'http://s.askci.com/stock/1/?' + urlencode(paras)
response = requests.get(url,headers = headers)
if response.status_code == :
return response.text
return None
except RequestException:
print('爬取失败')
def parse_one_page(html):
soup = BeautifulSoup(html,'lxml')
content = soup.select('#myTable04')[] #[0]将返回的list改为bs4类型
tbl = pd.read_html(content.prettify(),header = )[]
# prettify()优化代码,[0]从pd.read_html返回的list中提取出DataFrame
tbl.rename(columns = {'序号':'serial_number', '股票代码':'stock_code', '股票简称':'stock_abbre', '公司名称':'company_name', '省份':'province', '城市':'city', '主营业务收入(201712)':'main_bussiness_income', '净利润(201712)':'net_profit', '员工人数':'employees', '上市日期':'listing_date', '招股书':'zhaogushu', '公司财报':'financial_report', '行业分类':'industry_classification', '产品类型':'industry_type', '主营业务':'main_business'},inplace = True)
return tbl
def generate_mysql():
conn = pymysql.connect(
host='localhost',
user='root',
password='******',
port=,
charset = 'utf8',
db = 'wade')
cursor = conn.cursor()
sql = 'CREATE TABLE IF NOT EXISTS listed_company (serial_number INT(20) NOT NULL,stock_code INT(20) ,stock_abbre VARCHAR(20) ,company_name VARCHAR(20) ,province VARCHAR(20) ,city VARCHAR(20) ,main_bussiness_income VARCHAR(20) ,net_profit VARCHAR(20) ,employees INT(20) ,listing_date DATETIME(0) ,zhaogushu VARCHAR(20) ,financial_report VARCHAR(20) , industry_classification VARCHAR(20) ,industry_type VARCHAR(100) ,main_business VARCHAR(200) ,PRIMARY KEY (serial_number))'
cursor.execute(sql)
conn.close()
def write_to_sql(tbl, db = 'wade'):
engine = create_engine('mysql+pymysql://root:******@localhost:3306/{0}?charset=utf8'.format(db))
try:
tbl.to_sql('listed_company2',con = engine,if_exists='append',index=False)
# append表示在原有表基础上增加，但该表要有表头
except Exception as e:
print(e)
def main(page):
generate_mysql()
for i in range(,page):
html = get_one_page(i)
tbl = parse_one_page(html)
write_to_sql(tbl)
# # 单进程
if __name__ == '__main__':
main()
endtime = time.time()-start_time
print('程序运行了%.2f秒' %endtime)
# 多进程
from multiprocessing import Pool
if __name__ == '__main__':
pool = Pool()
pool.map(main, [i for i in range(,)]) #共有178页
endtime = time.time()-start_time
print('程序运行了%.2f秒' %(time.time()-start_time))
这段代码运行时候总是出现content = soup.select('#myTable04')[0] #[0]将返回的list改为bs4类型
IndexError: list index out of range，请问什么原因，怎么解决，谢谢！
