如何在 Python 中解析带有行跨度的 HTML 表？
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【中文标题】如何在 Python 中解析带有行跨度的 HTML 表？【英文标题】：How to parse an HTML table with rowspans in Python? 【发布时间】：2017-01-09 17:48:45 【问题描述】：问题
我正在尝试解析一个包含行跨度的 html 表格，例如，我正在尝试解析我的大学日程。
我遇到的问题是，如果最后一行包含行跨度，则下一行缺少 TD，而行跨度现在是缺少的 TD。
我不知道如何解释这一点，我希望能够解析这个时间表。
我尝试了什么
几乎所有我能想到的。
我得到的结果
[
'blok_eind': 4,
'blok_start': 3,
'dag': 4, # Should be 5
'leraar': 'DOODF000',
'lokaal': 'ALK C212',
'vak': 'PROJ-T',
,
]
如您所见，在上面的输出 sn-p 中有一个值为 PROJ-T 的 vak 键，dag 是 4 而它应该是 5（又名 Friday/Vrijdag），如此处所示：
我想要的结果
一个 Python dict()，看起来像上面发布的那个，但具有正确的值
地点：
day/dag 是一个 1~5 的整数，代表周一~周五
block_start/blok_start 是一个 int，表示课程开始的时间（时间块，表格左侧）
block_end/blok_eind 是一个 int，表示课程在哪个区块结束
clas-s-room/lokaal 是课程所在的教室代码
teacher/leraar是老师的身份证
course/vak是课程ID
上述数据的基本 HTML 结构
<center>
<table>
<tr>
<td>
<table>
<tbody>
<tr>
<td>
<font>
TEACHER-ID
</font>
</td>
<td>
<font>
<b>
CLAs-s-rOOM ID
</b>
</font>
</td>
</tr>
<tr>
<td>
<font>
COURSE ID
</font>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
</table>
</center>
代码
HTML
<CENTER><font size="3" face="Arial" color="#000000">
<BR></font>
<font size="6" face="Arial" color="#0000FF">
16AO4EIO1B
</font> <font size="4" face="Arial">
IO1B
</font>
<BR>
<TABLE border="3" rules="all" cellpadding="1" cellspacing="1">
<TR>
<TD align="center">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 align="center" nowrap="1">
<TABLE>
<TR>
<TD align="center" nowrap=1><font size="2" face="Arial" color="#000000">
Maandag 29-08
</font> </TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 align="center" nowrap="1">
<TABLE>
<TR>
<TD align="center" nowrap=1><font size="2" face="Arial">
Dinsdag 30-08
</font> </TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 align="center" nowrap="1">
<TABLE>
<TR>
<TD align="center" nowrap=1><font size="2" face="Arial">
Woensdag 31-08
</font> </TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 align="center" nowrap="1">
<TABLE>
<TR>
<TD align="center" nowrap=1><font size="2" face="Arial">
Donderdag 01-09
</font> </TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 align="center" nowrap="1">
<TABLE>
<TR>
<TD align="center" nowrap=1><font size="2" face="Arial">
Vrijdag 02-09
</font> </TD>
</TR>
</TABLE>
</TD>
</TR>
<TR>
<TD rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD align="center" rowspan="2" nowrap=1><font size="3" face="Arial">
<B>1</B>
</font> </TD>
<TD align="center" nowrap=1><font size="2" face="Arial">
8:30
</font> </TD>
</TR>
<TR>
<TD align="center" nowrap=1><font size="2" face="Arial">
9:20
</font> </TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=4 align="center" nowrap="1">
<TABLE>
<TR>
<TD nowrap=1><font size="2" face="Arial">
BLEEJ002
</font> </TD>
<TD nowrap=1><font size="2" face="Arial">
<B>ALK B021</B>
</font> </TD>
</TR>
<TR>
<TD colspan="2" nowrap=1><font size="2" face="Arial">
WEBD
</font> </TD>
</TR>
</TABLE>
</TD>
</TR>
<TR>
</TR>
<TR>
<TD rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD align="center" rowspan="2" nowrap=1><font size="3" face="Arial">
<B>2</B>
</font> </TD>
<TD align="center" nowrap=1><font size="2" face="Arial">
9:20
</font> </TD>
</TR>
<TR>
<TD align="center" nowrap=1><font size="2" face="Arial">
10:10
</font> </TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=4 align="center" nowrap="1">
<TABLE>
<TR>
<TD nowrap=1><font size="2" face="Arial">
BLEEJ002
</font> </TD>
<TD nowrap=1><font size="2" face="Arial">
<B>ALK B021B</B>
</font> </TD>
</TR>
<TR>
<TD colspan="2" nowrap=1><font size="2" face="Arial">
WEBD
</font> </TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
</TR>
<TR>
</TR>
<TR>
<TD rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD align="center" rowspan="2" nowrap=1><font size="3" face="Arial">
<B>3</B>
</font> </TD>
<TD align="center" nowrap=1><font size="2" face="Arial">
10:25
</font> </TD>
</TR>
<TR>
<TD align="center" nowrap=1><font size="2" face="Arial">
11:15
</font> </TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=4 align="center" nowrap="1">
<TABLE>
<TR>
<TD nowrap=1><font size="2" face="Arial">
DOODF000
</font> </TD>
<TD nowrap=1><font size="2" face="Arial">
<B>ALK C212</B>
</font> </TD>
</TR>
<TR>
<TD colspan="2" nowrap=1><font size="2" face="Arial">
PROJ-T
</font> </TD>
</TR>
</TABLE>
</TD>
</TR>
<TR>
</TR>
<TR>
<TD rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD align="center" rowspan="2" nowrap=1><font size="3" face="Arial">
<B>4</B>
</font> </TD>
<TD align="center" nowrap=1><font size="2" face="Arial">
11:15
</font> </TD>
</TR>
<TR>
<TD align="center" nowrap=1><font size="2" face="Arial">
12:05
</font> </TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=4 align="center" nowrap="1">
<TABLE>
<TR>
<TD nowrap=1><font size="2" face="Arial">
BLEEJ002
</font> </TD>
<TD nowrap=1><font size="2" face="Arial">
<B>ALK B021B</B>
</font> </TD>
</TR>
<TR>
<TD colspan="2" nowrap=1><font size="2" face="Arial">
MENT
</font> </TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
</TR>
<TR>
</TR>
<TR>
<TD rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD align="center" rowspan="2" nowrap=1><font size="3" face="Arial">
<B>5</B>
</font> </TD>
<TD align="center" nowrap=1><font size="2" face="Arial">
12:05
</font> </TD>
</TR>
<TR>
<TD align="center" nowrap=1><font size="2" face="Arial">
12:55
</font> </TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
</TR>
<TR>
</TR>
<TR>
<TD rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD align="center" rowspan="2" nowrap=1><font size="3" face="Arial">
<B>6</B>
</font> </TD>
<TD align="center" nowrap=1><font size="2" face="Arial">
12:55
</font> </TD>
</TR>
<TR>
<TD align="center" nowrap=1><font size="2" face="Arial">
13:45
</font> </TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=4 align="center" nowrap="1">
<TABLE>
<TR>
<TD nowrap=1><font size="2" face="Arial">
JONGJ003
</font> </TD>
<TD nowrap=1><font size="2" face="Arial">
<B>ALK B008</B>
</font> </TD>
</TR>
<TR>
<TD colspan="2" nowrap=1><font size="2" face="Arial">
BURG
</font> </TD>
</TR>
</TABLE>
</TD>
</TR>
<TR>
</TR>
<TR>
<TD rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD align="center" rowspan="2" nowrap=1><font size="3" face="Arial">
<B>7</B>
</font> </TD>
<TD align="center" nowrap=1><font size="2" face="Arial">
13:45
</font> </TD>
</TR>
<TR>
<TD align="center" nowrap=1><font size="2" face="Arial">
14:35
</font> </TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=4 align="center" nowrap="1">
<TABLE>
<TR>
<TD nowrap=1><font size="2" face="Arial">
FLUIP000
</font> </TD>
<TD nowrap=1><font size="2" face="Arial">
<B>ALK B004</B>
</font> </TD>
</TR>
<TR>
<TD colspan="2" nowrap=1><font size="2" face="Arial">
ICT algemeen Prakti
</font> </TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
</TR>
<TR>
</TR>
<TR>
<TD rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD align="center" rowspan="2" nowrap=1><font size="3" face="Arial">
<B>8</B>
</font> </TD>
<TD align="center" nowrap=1><font size="2" face="Arial">
14:50
</font> </TD>
</TR>
<TR>
<TD align="center" nowrap=1><font size="2" face="Arial">
15:40
</font> </TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=4 align="center" nowrap="1">
<TABLE>
<TR>
<TD nowrap=1><font size="2" face="Arial">
KOOLE000
</font> </TD>
<TD nowrap=1><font size="2" face="Arial">
<B>ALK B008</B>
</font> </TD>
</TR>
<TR>
<TD colspan="2" nowrap=1><font size="2" face="Arial">
NED
</font> </TD>
</TR>
</TABLE>
</TD>
</TR>
<TR>
</TR>
<TR>
<TD rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD align="center" rowspan="2" nowrap=1><font size="3" face="Arial">
<B>9</B>
</font> </TD>
<TD align="center" nowrap=1><font size="2" face="Arial">
15:40
</font> </TD>
</TR>
<TR>
<TD align="center" nowrap=1><font size="2" face="Arial">
16:30
</font> </TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
</TR>
<TR>
</TR>
<TR>
<TD rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD align="center" rowspan="2" nowrap=1><font size="3" face="Arial">
<B>10</B>
</font> </TD>
<TD align="center" nowrap=1><font size="2" face="Arial">
16:30
</font> </TD>
</TR>
<TR>
<TD align="center" nowrap=1><font size="2" face="Arial">
17:20
</font> </TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
<TD colspan=12 rowspan=2 align="center" nowrap="1">
<TABLE>
<TR>
<TD></TD>
</TR>
</TABLE>
</TD>
</TR>
<TR>
</TR>
</TABLE>
<TABLE cellspacing="1" cellpadding="1">
<TR>
<TD valign=bottom> <font size="4" face="Arial" color="#0000FF"></TR></TABLE><font size="3" face="Arial">
Periode1 29-08-2016 (35) - 04-09-2016 (35) G r u b e r & P e t t e r s S o f t w a r e
</font></CENTER>
Python
from pprint import pprint
from bs4 import BeautifulSoup
import requests
r = requests.get("http://rooster.horizoncollege.nl/rstr/ECO/AMR/400-ECO/Roosters/36"
"/c/c00025.htm")
daytable =
1: "Maandag",
2: "Dinsdag",
3: "Woensdag",
4: "Donderdag",
5: "Vrijdag"
timetable =
1: ("8:30", "9:20"),
2: ("9:20", "10:10"),
3: ("10:25", "11:15"),
4: ("11:15", "12:05"),
5: ("12:05", "12:55"),
6: ("12:55", "13:45"),
7: ("13:45", "14:35"),
8: ("14:50", "15:40"),
9: ("15:40", "16:30"),
10: ("16:30", "17:20"),
page = BeautifulSoup(r.content, "lxml")
roster = []
big_rows = 2
last_row_big = False
# There are 10 blocks, each made up out of 2 TR's, run through them
for block_count in range(2, 22, 2):
# There are 5 days, first column is not data we want
for day in range(2, 7):
dayroster =
"dag": 0,
"blok_start": 0,
"blok_eind": 0,
"lokaal": "",
"leraar": "",
"vak": ""
# This selector provides the clas-s-room
table_bold = page.select(
"html > body > center > table > tr:nth-of-type(" + str(block_count) + ") > td:nth-of-type(" + str(
day) + ") > table > tr > td > font > b")
# This selector provides the teacher's code and the course ID
table = page.select(
"html > body > center > table > tr:nth-of-type(" + str(block_count) + ") > td:nth-of-type(" + str(
day) + ") > table > tr > td > font")
# This gets the rowspan on the current row and column
rowspan = page.select(
"html > body > center > table > tr:nth-of-type(" + str(block_count) + ") > td:nth-of-type(" + str(
day) + ")")
try:
if table or table_bold and rowspan[0].attrs.get("rowspan") == "4":
last_row_big = True
# Setting end of class
dayroster["blok_eind"] = (block_count // 2) + 1
else:
last_row_big = False
# Setting end of class
dayroster["blok_eind"] = (block_count // 2)
except IndexError:
pass
if table_bold:
x = table_bold[0]
# Clas-s-room ID
dayroster["lokaal"] = x.contents[0]
if table:
iter = 0
for x in table:
content = x.contents[0].lstrip("\r\n").rstrip("\r\n")
# Cell has data
if content != "":
# Set start of class
dayroster["blok_start"] = block_count // 2
# Set day of class
dayroster["dag"] = day - 1
if iter == 0:
# Teacher ID
dayroster["leraar"] = content
elif iter == 1:
# Course ID
dayroster["vak"] = content
iter += 1
if table or table_bold:
# Store the data
roster.append(dayroster)
# Remove duplicates
seen = set()
new_l = []
for d in roster:
t = tuple(d.items())
if t not in seen:
seen.add(t)
new_l.append(d)
pprint(new_l)
【问题讨论】：
请包括 1) 你的 Python 代码，2) 重现问题所需的最少 HTML，3) 你的预期输出，以及 4) 你在问题本身中得到的，而不是比在外部网站上。 @Ryan 完成，我希望这会更好。 我遇到的问题是，如果最后一行包含行跨度，则下一行缺少一个 TD，而行跨度现在是缺少的 TD。 是您说<td> 实际上从 html 中丢失，或者您是说您的代码 认为 它实际上没有丢失？
@JohnGordon <td> 确实从 html 中丢失，因为前一行中的 rowspan 属性使其跨越多行，在 html 中导致需要少一个 @987654346 @ 在下一行，否则上一行有 5 列，下一行有 6 列（5x <td> 和 1x <td> 来自上一行，因为它具有 rowspan 属性）
requests 返回 404 错误页面
【参考方案1】：
也许最好使用像“findAll”这样的bs4内置函数来解析你的表格。
您可以使用以下代码：
from pprint import pprint
from bs4 import BeautifulSoup
import requests
r = requests.get("http://rooster.horizoncollege.nl/rstr/ECO/AMR/400-ECO/Roosters/36"
"/c/c00025.htm")
content=r.content
page = BeautifulSoup(content, "html")
table=page.find('table')
trs=table.findAll("tr", ,recursive=False)
tr_count=0
trs.pop(0)
final_table=
for tr in trs:
tds=tr.findAll("td", ,recursive=False)
if tds:
td_count=0
tds.pop(0)
for td in tds:
if td.has_attr('rowspan'):
final_table[str(tr_count)+"-"+str(td_count)]=td.text.strip()
if int(td.attrs['rowspan'])==4:
final_table[str(tr_count+1)+"-"+str(td_count)]=td.text.strip()
if final_table.has_key(str(tr_count)+"-"+str(td_count+1)):
td_count=td_count+1
td_count=td_count+1
tr_count=tr_count+1
roster=[]
for i in range(0,10): #iterate over time
for j in range(0,5): #iterate over day
item=final_table[str(i)+"-"+str(j)]
if len(item)!=0:
block_eind=i+1
try:
if final_table[str(i+1)+"-"+str(j)]==final_table[str(i)+"-"+str(j)]:
block_eind=i+2
except:
pass
try:
lokaal=item.split('\r\n \n\n')[0]
leraar=item.split('\r\n \n\n')[1].split('\n \n\r\n')[0]
vak=item.split('\n \n\r\n')[1]
except:
lokaal=leraar=vak="---"
dayroster =
"dag": j+1,
"blok_start": i+1,
"blok_eind": block_eind,
"lokaal": lokaal,
"leraar": leraar,
"vak": vak
dayroster_double =
"dag": j+1,
"blok_start": i,
"blok_eind": block_eind,
"lokaal": lokaal,
"leraar": leraar,
"vak": vak
#use to prevent double dict for same event
if dayroster_double not in roster:
roster.append(dayroster)
print (roster)
【讨论】：
你会使用find_all; findAll 仅用于支持 BeautifulSoup 3 代码，已弃用，取而代之的是符合 PEP8 的名称。
你说得对，谢谢。更改是在我的代码中进行的。很明显，你的版本绝对比我的好。问候
Next nit: ==True 在if 语句中永远不需要；如果表达式对if 本身产生了真实的结果，则离开测试。 if td.has_attr('rowspan'): 和 if td.has_attr('rowspan')==True: 一样好用，但更简洁、更易读。
Martijn，我知道，我同意你的看法。我根据this更改代码。【参考方案2】：
您必须跟踪前几行的行跨度，每列一个。
您可以简单地通过将行跨度的整数值复制到字典中来做到这一点，随后的行递减行跨度值直到它下降到1（或者我们可以将整数值存储负1并下降到0为了便于编码）。然后，您可以根据之前的行跨度调整后续表计数。
您的表格通过使用大小为 2 的默认跨度（以 2 为步长递增）使这有点复杂，但可以通过除以 2 轻松恢复为可管理的数字。
与其使用大量的 CSS 选择器，不如只选择表格行，然后我们将对其进行迭代：
roster = []
rowspans = # track rowspanning cells
# every second row in the table
rows = page.select('html > body > center > table > tr')[1:21:2]
for block, row in enumerate(rows, 1):
# take direct child td cells, but skip the first cell:
daycells = row.select('> td')[1:]
rowspan_offset = 0
for daynum, daycell in enumerate(daycells, 1):
# rowspan handling; if there is a rowspan here, adjust to find correct position
daynum += rowspan_offset
while rowspans.get(daynum, 0):
rowspan_offset += 1
rowspans[daynum] -= 1
daynum += 1
# now we have a correct day number for this cell, adjusted for
# rowspanning cells.
# update the rowspan accounting for this cell
rowspan = (int(daycell.get('rowspan', 2)) // 2) - 1
if rowspan:
rowspans[daynum] = rowspan
texts = daycell.select("table > tr > td > font")
if texts:
# class info found
teacher, clas-s-room, course = (c.get_text(strip=True) for c in texts)
roster.append(
'blok_start': block,
'blok_eind': block + rowspan,
'dag': daynum,
'leraar': teacher,
'lokaal': clas-s-room,
'vak': course
)
# days that were skipped at the end due to a rowspan
while daynum < 5:
daynum += 1
if rowspans.get(daynum, 0):
rowspans[daynum] -= 1
这会产生正确的输出：
['blok_eind': 2,
'blok_start': 1,
'dag': 5,
'leraar': u'BLEEJ002',
'lokaal': u'ALK B021',
'vak': u'WEBD',
'blok_eind': 3,
'blok_start': 2,
'dag': 3,
'leraar': u'BLEEJ002',
'lokaal': u'ALK B021B',
'vak': u'WEBD',
'blok_eind': 4,
'blok_start': 3,
'dag': 5,
'leraar': u'DOODF000',
'lokaal': u'ALK C212',
'vak': u'PROJ-T',
'blok_eind': 5,
'blok_start': 4,
'dag': 3,
'leraar': u'BLEEJ002',
'lokaal': u'ALK B021B',
'vak': u'MENT',
'blok_eind': 7,
'blok_start': 6,
'dag': 5,
'leraar': u'JONGJ003',
'lokaal': u'ALK B008',
'vak': u'BURG',
'blok_eind': 8,
'blok_start': 7,
'dag': 3,
'leraar': u'FLUIP000',
'lokaal': u'ALK B004',
'vak': u'ICT algemeen Prakti',
'blok_eind': 9,
'blok_start': 8,
'dag': 5,
'leraar': u'KOOLE000',
'lokaal': u'ALK B008',
'vak': u'NED']
此外，即使课程跨越超过 2 个区块，或者只有一个区块，此代码也将继续工作；支持任何行跨大小。
【讨论】：
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