Python 3.x 如何使用BeautifulSoup4解析表格并优雅地打印？

将文本数据收集到单个行和单元格的平面数组中。将其转置，使每列的所有内容都聚集到一行中。创建一个数组，其中包含每（最初）列最长项的长度。打印行时，使用此数据分隔每个单元格。代码：

import requests
from bs4 import BeautifulSoup

req = requests.get('Page.html')
soup = BeautifulSoup(req.content, 'html.parser')
tables = soup.find_all('table')
table = tables[0]
print(table.text)

这看起来就像你在控制台上做的一样优雅。（要添加垂直线，只需使用

|

而不是空格连接行。）

我内联了表数据，因为我无法访问您的

页面.html

，但是访问表数据似乎不是问题所在

---

哦，让我们在四周添加线条。就因为我能：

from bs4 import BeautifulSoup

content = '''
<table class="gridtable">
<tbody>
<tr>
<th>Store #</th><th>City Name</th><th>Orders</th></tr>
<tr><td>1</td><td style="text-align:left">Phoenix</td><td>70</td></tr>
<tr><td>2</td><td style="text-align:left">Columbus</td><td>74</td></tr>
<tr><td>3</td><td style="text-align:left">New York</td><td>112</td></tr>
<tr><td></td><td>TOTAL</td><td>256</td></tr></tbody>
</table>
'''

def print_table_nice(table):
    cells = [[cell.text for cell in row.find_all(['td','th'])] for row in table.find_all('tr')]
    transposed = list(map(list, zip(*cells)))
    widths = [str(max([len(str(item)) for item in items])) for items in transposed]
    for row in cells:
        print (' '.join(("{:"+width+"s}").format(item) for width,item in zip(widths,row)))

soup = BeautifulSoup(content, 'html.parser')
tables = soup.find_all('table')
table = tables[0]
print_table_nice(table)

这是一个有趣的复杂问题，因为这需要将

th

与

td

行分开。但是，对于多行行，它将无法正常工作。结果是：

+--------+-----------+-------+
|商店#|城市名称|订单|
+--------+-----------+-------+
|1 |凤凰城| 70|
|2 |哥伦布| 74|
|3 |纽约| 112|
||总计| 256|
+--------+-----------+-------+

@JohnS您可以使用。只需修改

print\u table\u nice

函数，返回一个嵌套列表并插入每个项目。@JohnS是的，在这里：您将找到一个带有嵌套列表的SQL查询示例，您可以找到documtation。

from bs4 import BeautifulSoup

content = '''
<table class="gridtable">
<tbody>
<tr>
<th>Store #</th><th>City Name</th><th>Orders</th></tr>
<tr><td>1</td><td style="text-align:left">Phoenix</td><td>70</td></tr>
<tr><td>2</td><td style="text-align:left">Columbus</td><td>74</td></tr>
<tr><td>3</td><td style="text-align:left">New York</td><td>112</td></tr>
<tr><td></td><td>TOTAL</td><td>256</td></tr></tbody>
</table>
'''

def print_table_nice(table):
    cells = [[cell.text for cell in row.find_all(['td','th'])] for row in table.find_all('tr')]
    transposed = list(map(list, zip(*cells)))
    widths = [str(max([len(str(item)) for item in items])) for items in transposed]
    for row in cells:
        print (' '.join(("{:"+width+"s}").format(item) for width,item in zip(widths,row)))

soup = BeautifulSoup(content, 'html.parser')
tables = soup.find_all('table')
table = tables[0]
print_table_nice(table)

def print_table_nice(table):
    header = [cell.text for cell in table.select('tr th')]
    cells = [[cell.text for cell in row.select('td')] for row in table.select('tr') if row.select('td')]
    table = [header]+cells
    transposed = list(map(list, zip(*table)))
    widths = [str(max([len(str(item)) for item in items])) for items in transposed]
    print ('+'+('-+-'.join('-'*int(width) for width in widths))+'+')
    print ('|'+(' | '.join(("{:"+width+"s}").format(item) for width,item in zip(widths,header)))+'|')
    print ('+'+('-+-'.join('-'*int(width) for width in widths))+'+')
    for row in cells:
        print ('|'+(' | '.join(("{:"+width+"s}").format(item) for width,item in zip(widths,row)))+'|')
    print ('+'+('-+-'.join('-'*int(width) for width in widths))+'+')