Python爬取数据并写入MySQL数据库的实例

首先我们来爬取 的一些数据。

按 f12 或 ctrl+u 审查元素，结果如下:

结构很清晰简单，我们就是要爬 tr 标签里面的 style 和 tr 下几个并列的 td 标签，下面是爬取的代码:

#!/usr/bin/env python
# coding=utf-8
import requests
from bs4 import beautifulsoup
import mysqldb
print('连接到mysql服务器...')
db = mysqldb.connect("localhost","hp","hp12345.","testdb")
print('连接上了!')
cursor = db.cursor()
cursor.execute("drop table if exists color")
sql = """create table color (
  color char(20) not null,
  value char(10),
  style char(50) )"""
cursor.execute(sql)
hdrs = {'user-agent':'mozilla/5.0 (x11; fedora; linux x86_64) applewebkit/537.36 (khtml, like gecko)'}
url = "http://html-color-codes.info/color-names/"
r = requests.get(url, headers = hdrs)
soup = beautifulsoup(r.content.decode('gbk', 'ignore'), 'lxml')
trs = soup.find_all('tr') # 获取全部tr标签成为一个列表
for tr in trs:    # 遍历列表里所有的tr标签单项
 style = tr.get('style') # 获取每个tr标签里的属性style
 tds = tr.find_all('td') # 将每个tr标签下的td标签获取为列表
 td = [x for x in tds] # 获取的列表
 name = td[1].text.strip()  # 直接从列表里取值
 hex = td[2].text.strip()
 # print u'颜色: ' + name + u'颜色值: '+ hex + u'背景色样式: ' + style
 # print 'color: ' + name + '\tvalue: '+ hex + '\tstyle: ' + style
 insert_color = ("insert into color(color,value,style)" "values(%s,%s,%s)")
 data_color = (name, hex, style)
 cursor.execute(insert_color, data_color)
 db.commit()
 # print '******完成此条插入!' 
print '爬取数据并插入mysql数据库完成...'

运行结果:

$ mysql -u hp -p
enter password: 
welcome to the mysql monitor. commands end with ; or \g.
your mysql connection id is 28
server version: 5.7.17 mysql community server (gpl)
copyright (c) 2000, 2011, oracle and/or its affiliates. all rights reserved.
oracle is a registered trademark of oracle corporation and/or its
affiliates. other names may be trademarks of their respective
owners.
type 'help;' or '\h' for help. type '\c' to clear the current input statement.
mysql> use testdb
reading table information for completion of table and column names
you can turn off this feature to get a quicker startup with -a
database changed
mysql> select * from color;
+----------------------+--------+----------------------------------------+
| color    | value | style         |
+----------------------+--------+----------------------------------------+
| indianred   | cd5c5c | background-color:indianred;   |
| lightcoral   | f08080 | background-color:lightcoral;   |
| salmon    | fa8072 | background-color:salmon;    |
| darksalmon   | e9967a | background-color:darksalmon;   |
| lightsalmon   | ffa07a | background-color:lightsalmon;   |
| crimson    | dc143c | background-color:crimson;    |
| red     | ff0000 | background-color:red;     |
| firebrick   | b22222 | background-color:firebrick;   |
| darkred    | 8b0000 | background-color:darkred;    |
| pink     | ffc0cb | background-color:pink;     |
| lightpink   | ffb6c1 | background-color:lightpink;   |
| hotpink    | ff69b4 | background-color:hotpink;    |
| deeppink    | ff1493 | background-color:deeppink;    |
...
| antiquewhite   | faebd7 | background-color:antiquewhite;   |
| linen    | faf0e6 | background-color:linen;    |
| lavenderblush  | fff0f5 | background-color:lavenderblush;  |
| mistyrose   | ffe4e1 | background-color:mistyrose;   |
| gainsboro   | dcdcdc | background-color:gainsboro;   |
| lightgrey   | d3d3d3 | background-color:lightgrey;   |
| silver    | c0c0c0 | background-color:silver;    |
| darkgray    | a9a9a9 | background-color:darkgray;    |
| gray     | 808080 | background-color:gray;     |
| dimgray    | 696969 | background-color:dimgray;    |
| lightslategray  | 778899 | background-color:lightslategray;  |
| slategray   | 708090 | background-color:slategray;   |
| darkslategray  | 2f4f4f | background-color:darkslategray;  |
| black    | 000000 | background-color:black;    |
+----------------------+--------+----------------------------------------+
143 rows in set (0.00 sec)

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