限制由python搜索的文本区域

我想搜索并计算字符串在webscrape中出现的次数。不过，我想在Webscrape中的x和y之间进行搜索。限制由python搜索的文本区域

任何人都可以告诉我最简单的方法来计算主要渔夫和次要渔民之间的SEA BASS在下面的示例webscrape。

<p style="color: #555555; 
    font-family: Arial,Helvetica,sans-serif; 
    font-size: 12px; 
    line-height: 18px;">June 21, 2013 By FISH PPL Admin </small> 

</div> 
<!-- Post Body Copy --> 

<div class="post-bodycopy clearfix"><p>MAIN FISHERMAN &#8211; </p> 
<p><strong>CHAMP</strong> &#8211; Pedro 00777<br /> 
BAIT &#8211; LOCATION1 &#8211; 2:30 &#8211; SEA BASS (3 LBS 11/4)<br /> 
MULTI – LOCATION2 &#8211; 7:30 &#8211; COD (3 LBS 13/8)<br /> 
LURE – LOCATION5 &#8211; 3:20 &#8211; RUDD (2 LBS 6/1)</p> 
<p>JOE BLOGGS <a href="url">url</a><br /> 
BAIT &#8211; LOCATION4 &#8211; 4:45 &#8211; ROACH (5 LBS 3/1)<br /> 
MULTI – LOCATION2 &#8211; 5:50 &#8211; PERCH (3 LBS 6/1)<br /> 
LURE – LOCATION1 &#8211; 3:45 &#8211; PIKE (2 LBS 5/1) </p> 
BAIT &#8211; LOCATION1 &#8211; 2:30 &#8211; SEA BASS (3 LBS 11/4)<br /> 
MULTI – LOCATION1 &#8211; 3:45 &#8211; JUST THE JUDGE (3 LBS 3/1)<br /> 
LURE – LOCATION3 &#8211; 8:25 &#8211; SCHOOL FEES (2 LBS 7/1)</p> 
<div class="post-bodycopy clearfix"><p>SECONDARY FISHERMAN &#8211; </p> 
<p><strong>SPOON &#8211; <a href="url">url</a></strong><br /> 
BAIT &#8211; LOCATION1 &#8211; 2:30 &#8211; SEA BASS (3 LBS 11/4)<br /> 
MULTI – LOCATION2 &#8211; 7:30 &#8211; COD (3 LBS 7/4)<br /> 
LURE – LOCATION1 &#8211; 4:25 &#8211; TROUT (2 LBS 5/1)</p>

我试图用下面的代码来实现这一点，但无济于事。

html = website.read() 

pattern_to_exclude_unwanted_data = re.compile('MAIN FISHERMAN(.*)SECONDARY FISHERMAN') 

excluding_unwanted_data = re.findall(pattern_to_exclude_unwanted_data, html) 

print excluding_unwanted_data("SEA BASS")

来源

2013-06-21 AEA

做的两个步骤：

提取主要渔夫和二次渔夫之间的子字符串。
计数鲈鱼

像这样：

relevant = re.search(r"MAIN FISHERMAN(.*)SECONDARY FISHERMAN", html, re.DOTALL).group(1) 
found = relevant.count("SEA BASS")

来源

2013-06-21 19:06:56 alexis

哎呀，是的我没有想到DOTALL--而“组合”这个东西只是马虎，谢谢！ – alexis

伪代码（未经测试）：

count = 0 
enabled = false 
for line in file: 
    if 'MAIN FISHERMAN' in line: 
    enabled = true 
    elif enabled and 'SEA BASS' in line: 
    count += 1 
    elif 'SECONDARY FISHERMAN' in line: 
    enabled = false

来源

2013-06-21 18:56:49 DaoWen

如果你想使用'MAIN FISHERMAN'和'SECONDARY FISHERMAN'为标记找到<div>元素数内'SEA BASS'：

import re 
from bs4 import BeautifulSoup # $ pip install beautifulsoup4 

soup = BeautifulSoup(html) 
inbetween = False 
count = 0 
for div in soup.find_all('div', ["post-bodycopy", "clearfix"]): 
    if not inbetween: 
     inbetween = div.find(text=re.compile('MAIN FISHERMAN')) # check start 
    else: # inbetween 
     inbetween = not div.find(text=re.compile('SECONDARY FISHERMAN')) # end 
    if inbetween: 
     count += len(div.find_all(text=re.compile('SEA BASS'))) 

print(count)

来源

2013-06-21 19:44:39 jfs

限制由python搜索的文本区域

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