我正在抓取一个网站，它拉动页面的内容，但是有些类别的标题在技术上是空的，但仍显示标题。我只想查看包含事件的类别。理想情况下，我什至可以包含每个事务的组成部分，以便选择要显示的元素。
import requests
from bs4 import BeautifulSoup
headers = {'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36'}
print('Scraping NH Dept of Banking...')
print()
NHurl = 'https://www.nh.gov/banking/corporate-activities/index.htm'
NHr = requests.get(NHurl, headers = headers)
NHsoup = BeautifulSoup(NHr.text, 'html.parser')
NHlist = []
for events in NHsoup.findAll('tr')[2:]:
print(events.text)
NHlist.append(events.text)
print(' '.join(NHlist))
就像我说的那样，这可以获取所有信息，但是有很多标头/空白不需要被提取。例如，在我撰写本文时，“获取”，“转换”和“控制权变更”为空，但标头仍然存在，并且标头后面有相对较大的空白空间。我觉得我需要某种循环来遍历每个标头（'td'），然后获取其内容（'tr'），但我不确定如何执行。
答案 0 :(得分：1)
您可以使用itertools.groupby对元素进行分组，然后过滤出空行：
import requests
from itertools import groupby
from bs4 import BeautifulSoup
headers = {'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36'}
print('Scraping NH Dept of Banking...')
print()
NHurl = 'https://www.nh.gov/banking/corporate-activities/index.htm'
NHr = requests.get(NHurl, headers = headers)
NHsoup = BeautifulSoup(NHr.text, 'html.parser')
NHlist = []
for _, g in groupby(NHsoup.select('tr'), lambda k, d={'g':0}: (d.update(g=d['g']+1), d['g']) if k.select('th') else (None, d['g'])):
s = [tag.get_text(strip=True, separator=' ') for tag in g]
if any(i == '' for i in s):
continue
NHlist.append(s)
# This is just pretty printing, all the data are already in NHlist:
l = max(map(len,(j for i in NHlist for j in i))) + 5
for item in NHlist:
print('{: <4} {}'.format(' ', item[0]))
print('-' * l)
for i, ev in enumerate(item[1:], 1):
print('{: <4} {}'.format(i, ev))
print()
打印：
Scraping NH Dept of Banking...
New Bank
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 12/11/18 The Millyard Bank
Interstate Bank Combination
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 01/16/19 Optima Bank & Trust Company with and into Cambridge Trust Company Portsmouth, NH 03/29/19
Amendment to Articles of Agreement or Incorporation; Business or Capital Plan
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 11/26/18 John Hancock Trust Company Boston, MA 01/14/19
2 12/04/18 Franklin Savings Bank Franklin, NH 01/28/19
3 12/12/18 MFS Heritage Trust Company Boston, MA 01/28/19
4 02/25/19 Ankura Trust Company, LLC Fairfield, CT 03/22/19
5 4/25/19 Woodsville Guaranty Savings Bank Woodsville, NH 06/04/19
6 5/10/19 AB Trust Company New York, NY 06/04/19
Reduction in Capital
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 03/07/19 Primary Bank Bedford, NH 04/10/19
Amendment to Bylaws
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 12/10/18 Northeast Credit Union Porstmouth, NH 02/25/19
2 2/25/19 Members First Credit Union Manchester, NH 04/05/19
3 4/24/19 St. Mary's Bank Manchester, NH 05/30/19
4 6/28/19 Bellwether Community Credit Union
Interstate Branch Office
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 01/23/19 Newburyport Five Cents Savings Bank 141 Portsmouth Ave Exeter, NH 02/01/19
2 03/08/19 One Credit Union Newport, NH 03/29/19
3 03/01/19 JPMorgan Chase Bank, NA Nashua, NH 04/04/19
4 03/26/19 Mascoma Bank Lebanon, NH 04/09/19
5 04/24/19 Newburyport Five Cents Savings Bank 321 Lafayette Rd Hampton NH 05/08/19
6 07/10/19 Mascoma Bank 242-244 North Winooski Avenue Burlington VT 07/18/19
7 07/10/19 Mascoma Bank 431 Pine Street Burlington VT 07/18/19
Interstate Branch Office Closure
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 02/15/19 The Provident Bank 321 Lafayette Rd Hampton, NH 02/25/19
New Branch Office
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 12/07/18 Bank of New Hampshire 16-18 South Main Street Concord NH 01/02/19
2 3/4/19 Triangle Credit Union 360 Daniel Webster Highway, Merrimack, NH 03/11/19
3 04/03/19 Bellwether Community Credit Union 425-453 Commercial Street Manchester, NH 04/17/19
4 06/11/19 Primary Bank 23 Crystal Avenue Derry NH 06/11/19
Branch Office Closure
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 5/15/19 Northeast Credit Union Merrimack, NH 05/21/19
New Loan Production Office
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 04/08/19 Community National Bank 367 Route 120, Unit B-5 Lebanon, NH
03766-1430 04/15/19
Loan Production Office Closure
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 07/22/19 The Provident Bank 20 Trafalgar Square, Suite 447 Nashua NH 03063 07/31/19
Trade Name Requests
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 04/16/19 John Hancock Trust Company To use trade name "Manulife Investment Management Trust Company" 04/24/19
New Trust Company
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 02/19/19 Janney Trust Co., LLC
2 02/25/19 Darwin Trust Company of New Hampshire, LLC
3 07/15/`9 Harbor Trust Company
Dissolution of Trust Company
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 09/19/17 Cambridge Associates Fiduciary Trust, LLC Boston, MA 02/05/19
Trust Office Closure
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 5/10/19 Charter Trust Company Rochester, NH 05/20/19
New Trust Office
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 02/25/19 Ankura Trust Company, LLC 140 Sherman Street, 4th Floor Fairfield, CT 06824 03/22/19
Relocation of Trust Office
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 01/23/19 Geode Capital Management Trust Company, LLC Relocate from: One Post Office Square, 20th Floor, Boston MA To: 100 Summer Street, 12th Flr, Boston, MA 02/01/19
2 03/15/19 Drivetrain Trust Company LLC Relocate from: 630 3rd Avenue, 21st Flr New York, NY 10017 To: 410 Park Avenue, Suite 900 New York, NY 10022 03/29/19
3 04/14/19 Boston Partners Trust Company Relocate from: 909 Third Avenue New York, NY 10022 To: One Grand Central Place 60 East 42nd Street, Ste 1550 New York, NY 10165 04/23/19
答案 1 :(得分：1)
您可以测试哪些行包含所有'\ xa0'（显示为空白）并排除。我追加到列表并转换为pandas数据框，但是您可以直接打印该行。
import requests
from bs4 import BeautifulSoup as bs
import pandas as pd
r = requests.get('https://www.nh.gov/banking/corporate-activities/index.htm')
soup = bs(r.content, 'lxml')
results = []
for tr in soup.select('tr'):
row = [i.text for i in tr.select('th,td')]
if row.count('\xa0') != len(row):
results.append(row)
pd.set_option('display.width', 100)
df = pd.DataFrame(results)
df.style.set_properties(**{'text-align': 'left'})
df.columns = df.iloc[0]
df = df[1:]
df.fillna(value='', inplace=True)
print(df.head(20))
答案 2 :(得分：0)
不确定这是否是您想要的方式，也许还有一种更优雅的方式，但是我基本上是这样做的
包含所有空值和上一行（它是子标头）的已删除行
将熊猫作为pd导入
print（“正在清除银行的NH部门...”） print（）
NHurl ='https://www.nh.gov/banking/corporate-activities/index.htm'
df = pd.read_html（NHurl）[0] top_row = pd.DataFrame（[df.columns]，index = [-1]） df.columns = top_row.columns df = df.append（top_row，sort = True）.sort_index（）。reset_index（drop = True）
null_rows = df [df.isnull（）。values.all（axis = 1）]。index.tolist（）
drop_hdr_rows = [x-null中的x代表x-1] drop_rows = drop_hdr_rows + null_rows
new_df = df [〜df.index.isin（drop_rows）]
输出：
print (new_df.to_string())
0 1 2 3
2 New Bank New Bank New Bank New Bank
3 12/11/18 The Millyard Bank NaN NaN
4 Interstate Bank Combination Interstate Bank Combination Interstate Bank Combination Interstate Bank Combination
5 01/16/19 Optima Bank & Trust Company with and into Camb... Portsmouth, NH 03/29/19
12 Amendment to Articles of Agreement or Incorpor... Amendment to Articles of Agreement or Incorpor... Amendment to Articles of Agreement or Incorpor... Amendment to Articles of Agreement or Incorpor...
13 11/26/18 John Hancock Trust Company Boston, MA 01/14/19
14 12/04/18 Franklin Savings Bank Franklin, NH 01/28/19
15 12/12/18 MFS Heritage Trust Company Boston, MA 01/28/19
16 02/25/19 Ankura Trust Company, LLC Fairfield, CT 03/22/19
17 4/25/19 Woodsville Guaranty Savings Bank Woodsville, NH 06/04/19
18 5/10/19 AB Trust Company New York, NY 06/04/19
19 Reduction in Capital Reduction in Capital Reduction in Capital Reduction in Capital
20 03/07/19 Primary Bank Bedford, NH 04/10/19
21 Amendment to Bylaws Amendment to Bylaws Amendment to Bylaws Amendment to Bylaws
22 12/10/18 Northeast Credit Union Porstmouth, NH 02/25/19
23 2/25/19 Members First Credit Union Manchester, NH 04/05/19
24 4/24/19 St. Mary's Bank Manchester, NH 05/30/19
25 6/28/19 Bellwether Community Credit Union NaN NaN
26 Interstate Branch Office Interstate Branch Office Interstate Branch Office Interstate Branch Office
27 01/23/19 Newburyport Five Cents Savings Bank 141 Portsmouth Ave Exeter, NH 02/01/19
28 03/08/19 One Credit Union Newport, NH 03/29/19
29 03/01/19 JPMorgan Chase Bank, NA Nashua, NH 04/04/19
30 03/26/19 Mascoma Bank Lebanon, NH 04/09/19
31 04/24/19 Newburyport Five Cents Savings Bank 321 Lafayette Rd Hampton NH 05/08/19
32 07/10/19 Mascoma Bank 242-244 North Winooski Avenue Burlington VT 07/18/19
33 07/10/19 Mascoma Bank 431 Pine Street Burlington VT 07/18/19
34 Interstate Branch Office Closure Interstate Branch Office Closure Interstate Branch Office Closure Interstate Branch Office Closure
35 02/15/19 The Provident Bank 321 Lafayette Rd Hampton, NH 02/25/19
36 New Branch Office New Branch Office New Branch Office New Branch Office
37 12/07/18 Bank of New Hampshire 16-18 South Main Street Concord NH 01/02/19
38 3/4/19 Triangle Credit Union 360 Daniel Webster Highway, Merrimack, NH 03/11/19
39 04/03/19 Bellwether Community Credit Union 425-453 Commercial Street Manchester, NH 04/17/19
40 06/11/19 Primary Bank 23 Crystal Avenue Derry NH 06/11/19
41 Branch Office Closure Branch Office Closure Branch Office Closure Branch Office Closure
42 5/15/19 Northeast Credit Union Merrimack, NH 05/21/19
43 New Loan Production Office New Loan Production Office New Loan Production Office New Loan Production Office
44 04/08/19 Community National Bank 367 Route 120, Unit B-5 Lebanon, NH 03766-1430 04/15/19
45 Loan Production Office Closure Loan Production Office Closure Loan Production Office Closure Loan Production Office Closure
46 07/22/19 The Provident Bank 20 Trafalgar Square, Suite 447 Nashua NH 03063 07/31/19
51 Trade Name Requests Trade Name Requests Trade Name Requests Trade Name Requests
52 04/16/19 John Hancock Trust Company To use trade name "Manulife Investment Managem... 04/24/19
53 New Trust Company New Trust Company New Trust Company New Trust Company
54 02/19/19 Janney Trust Co., LLC NaN NaN
55 02/25/19 Darwin Trust Company of New Hampshire, LLC NaN NaN
56 07/15/`9 Harbor Trust Company NaN NaN
57 Dissolution of Trust Company Dissolution of Trust Company Dissolution of Trust Company Dissolution of Trust Company
58 09/19/17 Cambridge Associates Fiduciary Trust, LLC Boston, MA 02/05/19
59 Trust Office Closure Trust Office Closure Trust Office Closure Trust Office Closure
60 5/10/19 Charter Trust Company Rochester, NH 05/20/19
61 New Trust Office New Trust Office New Trust Office New Trust Office
62 02/25/19 Ankura Trust Company, LLC 140 Sherman Street, 4th Floor Fairfield, CT 0... 03/22/19
63 Relocation of Trust Office Relocation of Trust Office Relocation of Trust Office Relocation of Trust Office
64 01/23/19 Geode Capital Management Trust Company, LLC Relocate from: One Post Office Square, 20th Fl... 02/01/19
65 03/15/19 Drivetrain Trust Company LLC Relocate from: 630 3rd Avenue, 21st Flr New Y... 03/29/19
66 04/14/19 Boston Partners Trust Company Relocate from: 909 Third Avenue New York, NY ... 04/23/19