Python 获取NavigatableList的第二个元素

这是html：

<table>
<tr><td>1 EUR</td><td>4,2989</td></tr>
<tr><td>1 USD</td><td>3,7575</td></tr>
<tr><td>1 CHF</td><td>3,8245</td></tr>
<tr><td>1 GBP</td><td>4,7907</td></tr>
<tr><td>100 JPY</td><td>3,4727</td></tr>
</table>

错误

错误

错误

错误

---

请记住，这些数字是字符串，在将它们转换为浮点数之前，首先需要对它们进行转换，我认为您之所以会出现错误，是因为

.children

还将包含诸如“\n”之类的行分隔符，这些行分隔符将被视为

bs4.element.navigablesting。

如果您将其视为标记，则最有可能得到

AttributeError:

import bs4
from bs4 import BeautifulSoup
html="""
<table>
<tr><td>1 EUR</td><td>4,2989</td></tr>
<tr><td>1 USD</td><td>3,7575</td></tr>
<tr><td>1 CHF</td><td>3,8245</td></tr>
<tr><td>1 GBP</td><td>4,7907</td></tr>
<tr><td>100 JPY</td><td>3,4727</td></tr>
</table>
"""
soup=BeautifulSoup(html,'html.parser')
table=soup.find('table')
for child in table.children:
    print(repr(child))

for c in soup.children:
    print(c.find("td")[1])

for c in soup.children:
    for cc in c.children:
        print(cc)

for c in soup.children:
    print(c.next_sibling)

from bs4 import BeautifulSoup

soup = BeautifulSoup("""<table>
<tr><td>1 EUR</td><td>4,2989</td></tr>
<tr><td>1 USD</td><td>3,7575</td></tr>
<tr><td>1 CHF</td><td>3,8245</td></tr>
<tr><td>1 GBP</td><td>4,7907</td></tr>
<tr><td>100 JPY</td><td>3,4727</td></tr>
</table>""")

for x in soup.find_all('tr'): # Iterate over tr tags
    print(x.find_all('td')[1].text) # find the second td tag and get its text

# Ouptput: 4,2989 3,7575 3,8245 4,7907 3,4727

import bs4
from bs4 import BeautifulSoup
html="""
<table>
<tr><td>1 EUR</td><td>4,2989</td></tr>
<tr><td>1 USD</td><td>3,7575</td></tr>
<tr><td>1 CHF</td><td>3,8245</td></tr>
<tr><td>1 GBP</td><td>4,7907</td></tr>
<tr><td>100 JPY</td><td>3,4727</td></tr>
</table>
"""
soup=BeautifulSoup(html,'html.parser')
table=soup.find('table')
for child in table.children:
    print(repr(child))

'\n'
<tr><td>1 EUR</td><td>4,2989</td></tr>
'\n'
<tr><td>1 USD</td><td>3,7575</td></tr>
'\n'
<tr><td>1 CHF</td><td>3,8245</td></tr>
'\n'
<tr><td>1 GBP</td><td>4,7907</td></tr>
'\n'
<tr><td>100 JPY</td><td>3,4727</td></tr>
'\n'

import bs4
from bs4 import BeautifulSoup
html="""
<table>
<tr><td>1 EUR</td><td>4,2989</td></tr>
<tr><td>1 USD</td><td>3,7575</td></tr>
<tr><td>1 CHF</td><td>3,8245</td></tr>
<tr><td>1 GBP</td><td>4,7907</td></tr>
<tr><td>100 JPY</td><td>3,4727</td></tr>
</table>
"""
soup=BeautifulSoup(html,'html.parser')
table=soup.find('table')
for child in table.children:
    if type(child) is not bs4.element.NavigableString:
        print(child.findAll('td')[1].text)

4,2989
3,7575
3,8245
4,7907
3,4727