我正在尝试废弃以下链接中显示在表格中的股票代码清单：http://www.advfn.com/nyse/newyorkstockexchange.asp?companies=A我使用漂亮的汤取消了表格，但当我将其转换为Pandas数据框架时，我收到一个错误：TypeError：'NoneType'对象是不可赎回
我尝试了以下代码：
url = 'http://www.advfn.com/nyse/newyorkstockexchange.asp?companies=A'
res = requests.get(url)
soup = BeautifulSoup(res.content,'lxml')
table = soup.find("table",{"class":"market tab1"})
df = pd.read_html(table)
但它不知道如何解决它？为什么我会收到错误？
完整错误日志：
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
~/anaconda3/lib/python3.7/site-packages/pandas/io/html.py in _parse(flavor, io, match, attrs, encoding, displayed_only, **kwargs)
796 try:
--> 797 tables = p.parse_tables()
798 except Exception as caught:
~/anaconda3/lib/python3.7/site-packages/pandas/io/html.py in parse_tables(self)
212 def parse_tables(self):
--> 213 tables = self._parse_tables(self._build_doc(), self.match, self.attrs)
214 return (self._build_table(table) for table in tables)
~/anaconda3/lib/python3.7/site-packages/pandas/io/html.py in _build_doc(self)
618 # try to parse the input in the simplest way
--> 619 r = parse(self.io, parser=parser)
620 try:
~/anaconda3/lib/python3.7/site-packages/lxml/html/__init__.py in parse(filename_or_url, parser, base_url, **kw)
939 parser = html_parser
--> 940 return etree.parse(filename_or_url, parser, base_url=base_url, **kw)
941
src/lxml/etree.pyx in lxml.etree.parse()
src/lxml/parser.pxi in lxml.etree._parseDocument()
TypeError: 'NoneType' object is not callable
During handling of the above exception, another exception occurred:
TypeError Traceback (most recent call last)
<ipython-input-23-c3e05c494f63> in <module>
5 table = soup.find("table",{"class":"market tab1"})
6 #print(table)
----> 7 df = pd.read_html(table)
~/anaconda3/lib/python3.7/site-packages/pandas/io/html.py in read_html(io, match, flavor, header, index_col, skiprows, attrs, parse_dates, tupleize_cols, thousands, encoding, decimal, converters, na_values, keep_default_na, displayed_only)
985 decimal=decimal, converters=converters, na_values=na_values,
986 keep_default_na=keep_default_na,
--> 987 displayed_only=displayed_only)
~/anaconda3/lib/python3.7/site-packages/pandas/io/html.py in _parse(flavor, io, match, attrs, encoding, displayed_only, **kwargs)
799 # if `io` is an io-like object, check if it's seekable
800 # and try to rewind it before trying the next parser
--> 801 if hasattr(io, 'seekable') and io.seekable():
802 io.seek(0)
803 elif hasattr(io, 'seekable') and not io.seekable():
TypeError: 'NoneType' object is not callable
表乞讨：
<table cellpadding="0" cellspacing="1" class="market tab1" width="610">
<colgroup><col/><col/><col class="c"/></colgroup>
<tr><td class="tabh" colspan="3"><b>Companies listed on the NYSE</b></td></tr>
<tr><th>Equity</th><th>Symbol</th><th>Info</th></tr>
<tr class="ts0"><td align="left"><a href="http://ih.advfn.com/stock-market/NYSE/a-k-steel-AKS/stock-price">A K Steel</a></td><td><a href="http://ih.advfn.com/stock-market/NYSE/a-k-steel-AKS/stock-price">AKS</a></td><td><a href="http://ih.advfn.com/stock-market/NYSE/a-k-steel-AKS/chart"><img src="/s/stock-chart.gif"/></a><a href="http://ih.advfn.com/stock-market/NYSE/a-k-steel-AKS/news"><img src="/s/stock-news.gif"/></a><a href="http://ih.advfn.com/stock-market/NYSE/a-k-steel-AKS/financials"><img src="/s/fundamentals.gif"/></a><a href="http://ih.advfn.com/stock-market/NYSE/a-k-steel-AKS/trades"><img src="/s/stock-trades.gif"/></a></td></tr>
您正在将<class 'bs4.element.Tag'>元素传递给pandas read_html。你需要将它转换为string。
from bs4 import BeautifulSoup
import requests
import pandas as pd
url = 'http://www.advfn.com/nyse/newyorkstockexchange.asp?companies=A'
res = requests.get(url)
soup = BeautifulSoup(res.content,'lxml')
table = soup.find("table",{"class":"market tab1"})
df = pd.read_html(str(table))
print(df)
输出：
[ 0 1 2
0 Companies listed on the NYSE NaN NaN
1 Equity Symbol Info
2 A K Steel AKS NaN
3 A M R AMR NaN
4 A M R Cp 7.875 AAR NaN
5 A V X AVX NaN
6 A a R AIR NaN
7 A.h. Belo Corporation AHC NaN
8 Aaron Rents RNT.A NaN
9 Aaron Rents RNT NaN
10 Aarons Cl A AAN.A NaN
11 Aarons Inc. AAN NaN
12 Ab Svensk Cdss Arbmn CBJ NaN
13 Ab Svensk Ekport AXF NaN
14 Ab Svensk Ekportkrdt SQT NaN
15 Ab Svensk Ekportkred DVK NaN
16 Ab Svensk Ekportkred IWK NaN
17 Ab Svensk Ekportkred RCW NaN
18 Ab Svensk Ekportkred EOA NaN
19 Ab Svensk Msci Arn MIS NaN
20 Ab Svensk Russell REU NaN
21 Ab Svensk Sp Arns SAD NaN
22 Ab Svensk Sp Arns MHG NaN
23 Abb ABB NaN
24 Abbott Labs ABT NaN
25 Abercrombie & Fitch ANF NaN
26 Abitibi ABY NaN
27 Abm ABM NaN
28 Acadia AKR NaN
29 Acc Bear Amex Egy IMW NaN
.. ... ... ...
194 Ashland ASH NaN
195 Aspen Insurance AHL NaN
196 Assisted Living Concepts (nevada ALC NaN
197 Associated Estates AEC NaN
198 Assurant AIZ NaN
199 Assured Guaranty AGO NaN
200 Astoria AF NaN
201 Astrazeneca AZN NaN
202 Atlanta Gas Light ATG NaN
203 Atlas Pipeline APL NaN
204 Atlas Pipeline Holdings Lp AHD NaN
205 Atmos ATO NaN
206 Att T NaN
207 Att ATT NaN
208 Atwood Oceanics ATW NaN
209 Au Optronics AUO NaN
210 Autoliv ALV NaN
211 Autonation AN NaN
212 Autozone AZO NaN
213 Av Svensk Ekportkred NEH NaN
214 Avalonbay AVB NaN
215 Aventine Renew Enrgy AVR NaN
216 Avery Dennison AVY NaN
217 Avis Budget Grp. CAR NaN
218 Avista AVA NaN
219 Avnet AVT NaN
220 Avon Products AVP NaN
221 Axa AXA NaN
222 Axis AXS NaN
223 Azz AZZ NaN
[224 rows x 3 columns]]