Question

如果我需要多个超链接怎么办？一个又一个，每个都在一个新的线上。我得到“位置参数跟随关键字参数”。

out = open("index.html", "w")
out.write(page.format(
heading = "<h1>Road Fatalities in Australia</h1>", 
contents1 = "<p>On this site you will find road fatality statistical data.</p>", 
contents2 = "<p>...</p>", 
contents3 = "<p>...</p>", 
link = '<a href="fatalities_per_year.html">A Look at Death Rates Over the Years</a>',
'<a href="fatalities_per_state.html">Which State has the Highest Fatality Rate?</a>',
'<a href="fatalities_per_day.html">Which Day of the Week is Deadliest?</a>',
'<a href="fatalities_per_time.html">Which Time of Day is the Deadliest?</a>',
'<a href="fatalities_trucks.html">How Many Trucks are in Fatal Crashes</a>',
'<a href="fatalities_speed_zones.html">Which Speed Zones are the Deadliest?</a>',
'<a href="fatalities_gender.html">Does Your Gender Increase the Risk of Dying?</a>',
'<a href="fatalities_age.html">Does Your Age Have Anything to do With Death-rates?</a>',
'<a href="fatalities_user.html">Fatality Data</a>'))
out.close()

我也试过这个：

out = open("index.html", "w")
out.write(page.format(
heading = "<h1>Road Fatalities in Australia</h1>", 
contents1 = "<p>On this site you will find road fatality statistical data.</p>", 
contents2 = "<p>...</p>", 
contents3 = "<p>...</p>", 
link = '<ul>
    <li><a href="fatalities_per_year.html">A Look at Death Rates Over the Years</a></li>
    <li><a href="fatalities_per_state.html">Which State has the Highest Fatality Rate?</a></li>
    <li><a href="fatalities_per_day.html">Which Day of the Week is Deadliest?</a></li>
    <li><a href="fatalities_per_time.html">Which Time of Day is the Deadliest?</a></li>
    <li><a href="fatalities_trucks.html">How Many Trucks are in Fatal Crashes</a></li>
    <li><a href="fatalities_speed_zones.html">Which Speed Zones are the Deadliest?</a></li>
    <li><a href="fatalities_gender.html">Does Your Gender Increase the Risk of Dying?</a></li>
    <li><a href="fatalities_age.html">Does Your Age Have Anything to do With Death-rates?</a></li>
    <li><a href="fatalities_user.html">Fatality Data</a></li>
</ul>'
out.close()

我只需要一个接一个地列表中的链接。没有什么特别的，如下：

了解多年来的死亡率

哪个州的死亡率最高？

...等...

提前致谢

Answer 1

使用BeautifulSoup

from bs4 import BeautifulSoup

link = '''<ul>
<li><a href="fatalities_per_year.html">A Look at Death Rates Over the Years</a></li>
<li><a href="fatalities_per_state.html">Which State has the Highest Fatality Rate?</a></li>
<li><a href="fatalities_per_day.html">Which Day of the Week is Deadliest?</a></li>
<li><a href="fatalities_per_time.html">Which Time of Day is the Deadliest?</a></li>
<li><a href="fatalities_trucks.html">How Many Trucks are in Fatal Crashes</a></li>
<li><a href="fatalities_speed_zones.html">Which Speed Zones are the Deadliest?</a></li>
<li><a href="fatalities_gender.html">Does Your Gender Increase the Risk of Dying?</a></li>
<li><a href="fatalities_age.html">Does Your Age Have Anything to do With Death-rates?</a></li>
<li><a href="fatalities_user.html">Fatality Data</a></li>
</ul>'''

soup = BeautifulSoup(link,"lxml")
tags = soup.select("ul li a")
items = [tag.attrs['href'] for tag in tags]
print(items)

输出中

['fatalities_per_year.html', 'fatalities_per_state.html', 'fatalities_per_day.html', 'fatalities_per_time.html', 'fatalities_trucks.html', 'fatalities_speed_zones.html', 'fatalities_gender.html', 'fatalities_age.html', 'fatalities_user.html']

Answer 2

heading = "<h1>Road Fatalities in Australia</h1>"
contents1 = "<p>On this site you will find road fatality statistical data.</p>"
link = ['<a href="fatalities_per_year.html">A Look at Death Rates Over the Years</a>',
'<a href="fatalities_per_state.html">Which State has the Highest Fatality Rate?</a>',
'<a href="fatalities_per_day.html">Which Day of the Week is Deadliest?</a>',
'<a href="fatalities_per_time.html">Which Time of Day is the Deadliest?</a>',
'<a href="fatalities_trucks.html">How Many Trucks are in Fatal Crashes</a>',
'<a href="fatalities_speed_zones.html">Which Speed Zones are the Deadliest?</a>',
'<a href="fatalities_gender.html">Does Your Gender Increase the Risk of Dying?</a>',
'<a href="fatalities_age.html">Does Your Age Have Anything to do With Death-rates?</a>',
'<a href="fatalities_user.html">Fatality Data</a>']
with open("this.html", "w") as myfile:
    myfile.write(heading)
    myfile.write(contents1)
    for l in link:
        myfile.write(l)

输出

<h1>Road Fatalities in Australia</h1><p>On this site you will find road fatality statistical data.</p><a href="fatalities_per_year.html">A Look at Death Rates Over the Years</a><a href="fatalities_per_state.html">Which State has the Highest Fatality Rate?</a><a href="fatalities_per_day.html">Which Day of the Week is Deadliest?</a><a href="fatalities_per_time.html">Which Time of Day is the Deadliest?</a><a href="fatalities_trucks.html">How Many Trucks are in Fatal Crashes</a><a href="fatalities_speed_zones.html">Which Speed Zones are the Deadliest?</a><a href="fatalities_gender.html">Does Your Gender Increase the Risk of Dying?</a><a href="fatalities_age.html">Does Your Age Have Anything to do With Death-rates?</a><a href="fatalities_user.html">Fatality Data</a>

Answer 3

您获得的错误positional argument follows keyword argument是由于您将参数传递给page.format()函数的方式。

在您的第一个示例中，link参数是由逗号分隔的一串字符串。但只有第一行：

link = '<a href="fatalities_per_year.html">A Look at Death Rates Over the Years</a>'

被识别为名为link的关键字参数，其余行被视为位置参数，没有为其分配关键字。这是Python中的违规，位置（非命名参数）只能在关键字（命名）参数之前使用，因此是一个错误。

在第二个示例中，您尝试将多行字符串作为link参数传递，但您使用单引号执行此操作。要在Python中使用多行字符串，必须将其括在三引号中

some_string = """line 1
line 2"""

最容易解决的问题是：

out = open("index.html", "w")

out.write(page.format(
heading = "<h1>Road Fatalities in Australia</h1>", 
contents1 = "<p>On this site you will find road fatality statistical data.</p>", 
contents2 = "<p>...</p>", 
contents3 = "<p>...</p>", 
link = '''<ul>
    <li><a href="fatalities_per_year.html">A Look at Death Rates Over the Years</a></li>
    <li><a href="fatalities_per_state.html">Which State has the Highest Fatality Rate?</a></li>
    <li><a href="fatalities_per_day.html">Which Day of the Week is Deadliest?</a></li>
    <li><a href="fatalities_per_time.html">Which Time of Day is the Deadliest?</a></li>
    <li><a href="fatalities_trucks.html">How Many Trucks are in Fatal Crashes</a></li>
    <li><a href="fatalities_speed_zones.html">Which Speed Zones are the Deadliest?</a></li>
    <li><a href="fatalities_gender.html">Does Your Gender Increase the Risk of Dying?</a></li>
    <li><a href="fatalities_age.html">Does Your Age Have Anything to do With Death-rates?</a></li>
    <li><a href="fatalities_user.html">Fatality Data</a></li>
</ul>'''))
out.close()

哪会创造：

<h1>Road Fatalities in Australia</h1>
<p>On this site you will find road fatality statistical data.</p>
<p>...</p>
<p>...</p>
<ul>
    <li><a href="fatalities_per_year.html">A Look at Death Rates Over the Years</a></li>
    <li><a href="fatalities_per_state.html">Which State has the Highest Fatality Rate?</a></li>
    <li><a href="fatalities_per_day.html">Which Day of the Week is Deadliest?</a></li>
    <li><a href="fatalities_per_time.html">Which Time of Day is the Deadliest?</a></li>
    <li><a href="fatalities_trucks.html">How Many Trucks are in Fatal Crashes</a></li>
    <li><a href="fatalities_speed_zones.html">Which Speed Zones are the Deadliest?</a></li>
    <li><a href="fatalities_gender.html">Does Your Gender Increase the Risk of Dying?</a></li>
    <li><a href="fatalities_age.html">Does Your Age Have Anything to do With Death-rates?</a></li>
    <li><a href="fatalities_user.html">Fatality Data</a></li>
</ul>

鉴于

page = """{heading}
{contents1}
{contents2}
{contents3}
{link}"""

在Python中创建超链接列表

3 个答案: