Python 从表中提取行
我试图从下表中提取具有相应单元格的行:Python 从表中提取行,python,xpath,lxml,Python,Xpath,Lxml,我试图从下表中提取具有相应单元格的行: <table border="0" cellspacing="1" cellpading="3" width="100%"> <tr bgcolor="#505050"> <td><b></b></td> <td colspan="2" align="center" class="white"><b>Last Day</b></
<table border="0" cellspacing="1" cellpading="3" width="100%">
<tr bgcolor="#505050">
<td><b></b></td>
<td colspan="2" align="center" class="white"><b>Last Day</b></td>
<td colspan="2" align="center" class="white"><b>Last Week</b></td>
</tr>
<tr bgcolor="#505050">
<td class="white"><b>Race</b></td>
<td align="center" class="white"><b>Killed Players</b></td>
<td align="center" class="white"><b>Killed by Players</b></td>
<td align="center" class="white"><b>Killed Players</b></td>
<td align="center" class="white"><b>Killed by Players</b></td>
</tr>
<tr bgcolor="#F1E0C6">
<td>A</td>
<td align="right">0</td>
<td align="right">3</td>
<td align="right">0</td>
<td align="right">13</td>
</tr>
<tr bgcolor="#D4C0A1">
<td>B</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">7</td>
</tr>
<tr bgcolor="#F1E0C6">
<td>C</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">1</td>
</tr>
<tr bgcolor="#D4C0A1">
<td>D</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">7</td>
</tr>
<tr bgcolor="#505050">
<td class=white><b>Total</b></td>
<td align="right" class="white"><b>210</b></td>
<td align="right" class="white"><b>1060458</b></td>
<td align="right" class="white"><b>1132</b></td>
<td align="right" class="white"><b>5585115</b></td>
</tr>
但是,输出仍然包括第一行空单元格和最后一天/周单元格,如下所示:
['', 'Last Day', 'Last Week']
['A', '0', '3', '0', '13']
['B', '0', '0', '2', '0']
['C', '0', '3', '0', '5']
怎样才能摆脱它呢?只要把
tr
改成:
tr[not(contains(@bgcolor, "505050"))]
from lxml import html
HTML = """<table border="0" cellspacing="1" cellpading="3" width="100%">
<tr bgcolor="#505050">
<td><b></b></td>
<td colspan="2" align="center" class="white"><b>Last Day</b></td>
<td colspan="2" align="center" class="white"><b>Last Week</b></td>
</tr>
<tr bgcolor="#505050">
<td class="white"><b>Race</b></td>
<td align="center" class="white"><b>Killed Players</b></td>
<td align="center" class="white"><b>Killed by Players</b></td>
<td align="center" class="white"><b>Killed Players</b></td>
<td align="center" class="white"><b>Killed by Players</b></td>
</tr>
<tr bgcolor="#F1E0C6">
<td>A</td>
<td align="right">0</td>
<td align="right">3</td>
<td align="right">0</td>
<td align="right">13</td>
</tr>
<tr bgcolor="#D4C0A1">
<td>B</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">7</td>
</tr>
<tr bgcolor="#F1E0C6">
<td>C</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">1</td>
</tr>
<tr bgcolor="#D4C0A1">
<td>D</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">7</td>
</tr>
<tr bgcolor="#505050">
<td class=white><b>Total</b></td>
<td align="right" class="white"><b>210</b></td>
<td align="right" class="white"><b>1060458</b></td>
<td align="right" class="white"><b>1132</b></td>
<td align="right" class="white"><b>5585115</b></td>
</tr>"""
tree = html.fromstring(HTML)
results = defaultdict
for item in tree.xpath('//table/tr[not(contains(@bgcolor, "505050"))]'):
print item.xpath('.//td/text()')
['A', '0', '3', '0', '13']
['B', '0', '0', '0', '7']
['C', '0', '0', '0', '1']
['D', '0', '0', '0', '7']
因此您的代码应该如下所示:
tr[not(contains(@bgcolor, "505050"))]
from lxml import html
HTML = """<table border="0" cellspacing="1" cellpading="3" width="100%">
<tr bgcolor="#505050">
<td><b></b></td>
<td colspan="2" align="center" class="white"><b>Last Day</b></td>
<td colspan="2" align="center" class="white"><b>Last Week</b></td>
</tr>
<tr bgcolor="#505050">
<td class="white"><b>Race</b></td>
<td align="center" class="white"><b>Killed Players</b></td>
<td align="center" class="white"><b>Killed by Players</b></td>
<td align="center" class="white"><b>Killed Players</b></td>
<td align="center" class="white"><b>Killed by Players</b></td>
</tr>
<tr bgcolor="#F1E0C6">
<td>A</td>
<td align="right">0</td>
<td align="right">3</td>
<td align="right">0</td>
<td align="right">13</td>
</tr>
<tr bgcolor="#D4C0A1">
<td>B</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">7</td>
</tr>
<tr bgcolor="#F1E0C6">
<td>C</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">1</td>
</tr>
<tr bgcolor="#D4C0A1">
<td>D</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">0</td>
<td align="right">7</td>
</tr>
<tr bgcolor="#505050">
<td class=white><b>Total</b></td>
<td align="right" class="white"><b>210</b></td>
<td align="right" class="white"><b>1060458</b></td>
<td align="right" class="white"><b>1132</b></td>
<td align="right" class="white"><b>5585115</b></td>
</tr>"""
tree = html.fromstring(HTML)
results = defaultdict
for item in tree.xpath('//table/tr[not(contains(@bgcolor, "505050"))]'):
print item.xpath('.//td/text()')
['A', '0', '3', '0', '13']
['B', '0', '0', '0', '7']
['C', '0', '0', '0', '1']
['D', '0', '0', '0', '7']
尽管如此,我还是建议使用dict()。见:
tree = html.fromstring(HTML)
results = dict()
def unpack(data):
return data[0], data[1:]
for item in tree.xpath('//table/tr[not(contains(@bgcolor, "505050"))]'):
key, values = unpack(item.xpath('.//td/text()'))
results[key] = values
print results
输出:
{
'A': ['0', '3', '0', '13'],
'C': ['0', '0', '0', '1'],
'B': ['0', '0', '0', '7'],
'D': ['0', '0', '0', '7']
}
在Python3中,不需要像上面那样使用unpack()
函数,您只需要更改
key,values=unpack(item.xpath('.//td/text()')
tokey,*values=item.xpath('.//td/text()'))
见:
此外,如果需要,可以使用
sorted()
按字母(键)对结果进行排序:
[
('A', ['0', '3', '0', '13']),
('B', ['0', '0', '0', '7']),
('C', ['0', '0', '0', '1']),
('D', ['0', '0', '0', '7'])
]
你能发布你的预期输出吗?当然,更新了原始帖子。@随我的便。如果我的回答有助于你解决问题,请不要忘记接受我的回答:)