解析 html 表
首先,这是我当前的完整代码:
import urllib
from BeautifulSoup import BeautifulSoup
import sgmllib
import re
page = 'http://www.sec.gov/Archives/edgar/data/\
8177/000114036111018563/form10k.htm'
sock = urllib.urlopen(page)
raw = sock.read()
soup = BeautifulSoup(raw)
tablelist = soup.findAll('table')
class MyParser(sgmllib.SGMLParser):
def parse(self, segment):
self.feed(segment)
self.close()
def __init__(self, verbose=0):
sgmllib.SGMLParser.__init__(self, verbose)
self.descriptions = []
self.inside_td_element = 0
self.starting_description = 0
def start_td(self, attributes):
for name, value in attributes:
if name == "valign":
self.inside_td_element = 1
self.starting_description = 1
else:
self.inside_td_element = 1
self.starting_description = 1
def end_td(self):
self.inside_td_element = 0
def handle_data(self, data):
if self.inside_td_element:
if self.starting_description:
self.descriptions.append(data)
self.starting_description = 0
else:
self.descriptions[-1] += data
def get_descriptions(self):
return self.descriptions
counter = 0
trlist = []
dtablelist = []
while counter < len(tablelist):
trsegment = tablelist[counter].findAll('tr')
trlist.append(trsegment)
strsegment = str(trsegment)
myparser = MyParser()
myparser.parse(strsegment)
sub = myparser.get_descriptions()
dtablelist.append(sub)
counter = counter + 1
ex = []
dtablelist = [s for s in dtablelist if s != ex]
所以我想要完成的是从 html 文档中获取所有表格,然后将它们重新打印到 Excel 电子表格上。因此,当我创建 trlist 时,输出如下所示:
print trlist[1]
[<tr>
<td valign="top" width="25%"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT- SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-DECORATION: underline"> </font></td>
<td valign="top" width="25%">
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-DECORATION: underline">Title of each class</font></div>
</td>
<td valign="top" width="25%" style="TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-DECORATION: underline">Name of exchange</font></td>
<td valign="top" width="25%" style="TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-DECORATION: underline"> </font></td>
</tr>, <tr>
<td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td>
<td valign="top" width="25%">
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Common Stock, par value</font> </font></div>
</td>
<td valign="top" width="25%">
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center">
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="FONT-WEIGHT: bold"><font style="FONT-WEIGHT: bold">< <font style="FONT-WEIGHT: bold">NASDAQ Global Market</font></font></font></font></div>
</div>
</td>
<td valign="top" width="25%"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td>
</tr>,...
正如您所看到的,trlist 中的每个项目都是表中的每个单独行(...),这就是我想要的。但是,当我通过 sgmllib 解析器运行每个 trlist 项以检索标签之间的内容时,我得到以下输出:
print dtablelist[1]
['\nTitle of each class\n', 'Name of exchange', '\nCommon Stock, par value\n', '\n\nNASDAQ Global Market\n\n', '\n$1.00 per share\n']
如您所见,输出是每个内容作为它们自己的单独字符串,而不是每个内容的内容列表表行()。所以本质上我想要输出:
[['\nTitle of each class\n', 'Name of exchange'], ['\nCommon Stock, par value\n', '\n\nNASDAQ Global Market\n\n'], ['\n$1.00 per share\n']]
是因为我必须在用 MyParser 解析它之前将 trlist 转换为字符串吗?有谁知道解决这个问题的方法,允许我解析列表中的列表(又名 Inception 狗屎)?
To start off here's my current code in its entirety:
import urllib
from BeautifulSoup import BeautifulSoup
import sgmllib
import re
page = 'http://www.sec.gov/Archives/edgar/data/\
8177/000114036111018563/form10k.htm'
sock = urllib.urlopen(page)
raw = sock.read()
soup = BeautifulSoup(raw)
tablelist = soup.findAll('table')
class MyParser(sgmllib.SGMLParser):
def parse(self, segment):
self.feed(segment)
self.close()
def __init__(self, verbose=0):
sgmllib.SGMLParser.__init__(self, verbose)
self.descriptions = []
self.inside_td_element = 0
self.starting_description = 0
def start_td(self, attributes):
for name, value in attributes:
if name == "valign":
self.inside_td_element = 1
self.starting_description = 1
else:
self.inside_td_element = 1
self.starting_description = 1
def end_td(self):
self.inside_td_element = 0
def handle_data(self, data):
if self.inside_td_element:
if self.starting_description:
self.descriptions.append(data)
self.starting_description = 0
else:
self.descriptions[-1] += data
def get_descriptions(self):
return self.descriptions
counter = 0
trlist = []
dtablelist = []
while counter < len(tablelist):
trsegment = tablelist[counter].findAll('tr')
trlist.append(trsegment)
strsegment = str(trsegment)
myparser = MyParser()
myparser.parse(strsegment)
sub = myparser.get_descriptions()
dtablelist.append(sub)
counter = counter + 1
ex = []
dtablelist = [s for s in dtablelist if s != ex]
So what I want to accomplish is take all the tables from an html document, then reprint them onto an Excel spreadsheet. So when I create trlist the output looks like this:
print trlist[1]
[<tr>
<td valign="top" width="25%"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT- SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-DECORATION: underline"> </font></td>
<td valign="top" width="25%">
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-DECORATION: underline">Title of each class</font></div>
</td>
<td valign="top" width="25%" style="TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-DECORATION: underline">Name of exchange</font></td>
<td valign="top" width="25%" style="TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman; TEXT-DECORATION: underline"> </font></td>
</tr>, <tr>
<td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td>
<td valign="top" width="25%">
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Common Stock, par value</font> </font></div>
</td>
<td valign="top" width="25%">
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center">
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="FONT-WEIGHT: bold"><font style="FONT-WEIGHT: bold">< <font style="FONT-WEIGHT: bold">NASDAQ Global Market</font></font></font></font></div>
</div>
</td>
<td valign="top" width="25%"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td>
</tr>,...
As you can see each item in trlist is each individual row ( . . . ) of the table which is what I want. But when I run each trlist item through my sgmllib parser to retrieve the contents between the tags I get this output:
print dtablelist[1]
['\nTitle of each class\n', 'Name of exchange', '\nCommon Stock, par value\n', '\n\nNASDAQ Global Market\n\n', '\n$1.00 per share\n']
As you can see, the output is each of the contents as their own individual string, instead of a list of the contents of each table row (). So essentially I want the output:
[['\nTitle of each class\n', 'Name of exchange'], ['\nCommon Stock, par value\n', '\n\nNASDAQ Global Market\n\n'], ['\n$1.00 per share\n']]
Is it because I have to turn trlist into a string before I parse it with MyParser? Does anyone know any way around this, allowing me to parse lists within lists (aka Inception shit)?
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使用 lxml.html:
这是一些更完整的代码。它将文本存储在一个包含表列表的列表中,每个表都有一个 tr 列表,每个 tr 都有一个所有文本的列表。
希望这有帮助,干杯!
Using lxml.html:
And here is some more complete code. It stores the text in a list containing a list of tables, and each table has a list of tr's, and each tr has a list of all the text.
Hope this helps, cheers!
如果有人正在寻找相同问题的解决方案但使用的是 python 3:
即使您使用的是 python 3,您也不必使用外部库来解析 HTML 表。那里有
SGMLParser
类被html.parser
中的HTMLParser
替换。我已经为一个简单的派生HTMLParser
类编写了代码。它位于 github 存储库中 。它只是记住、
或
标记的当前范围。相对于使用 etree 的优点是它可以在不符合 xml 的 html 上正确运行并且不使用外部库。
您可以按以下方式使用该类(此处名为
HTMLTableParser
):该类的输出是表示表格的 2D 列表的列表。它看起来可能是这样的:
If somebody is searching for a solution of the same problem but is using python 3:
You don't have to use an external library for parsing an HTML table even if you are using python 3. There the
SGMLParser
class was replaced byHTMLParser
fromhtml.parser
. I've written code for a simple derivedHTMLParser
class. It is here in a github repo. It simply does remember the current scope of a<td>
,<tr>
or<table>
tag. The advantages over using etree are that it runs correctly on non-xml-compliant html and that it doesn't use external libraries.You can use that class (here named
HTMLTableParser
) the following way:The output of this is a list of 2D-lists representing tables. It looks maybe like this: