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Question

我正在使用BeautifulSoup，并且我继续在循环中继续不正确。所以我删除了continue，然后我的print语句出现了无效的语法错误。我正在运行BS4和Python 2.7.5所有帮助非常感谢。这是我的代码。

from bs4 import BeautifulSoup

soup = BeautifulSoup (open("43rd-congress.html"))

final_link = soup.p.a
final_link.decompose()

trs = soup.find_all('tr')

for tr in trs:
for link in tr.find_all('a'):
    fulllink = link.get('href')
    print fulllink #print in terminal to verify results

tds = tr.find_all("td")


try: #we are using "try" because the table is not well formatted. 
   names = str(tds[0].get_text()) 
   years = str(tds[1].get_text())
   positions = str(tds[2].get_text())
   parties = str(tds[3].get_text())
   states = str(tds[4].get_text())
   congress = tds[5].get_text()

except:
  print "bad tr string"
  continue 

print names, years, positions, parties, states, congress

Answer 1

由于您似乎有错误，我相信您的文件中可能确实存在错误的缩进。您的代码可能看起来像这样：

from bs4 import BeautifulSoup

soup = BeautifulSoup (open("43rd-congress.html"))

final_link = soup.p.a
final_link.decompose()

trs = soup.find_all('tr')

for tr in trs:

    for link in tr.find_all('a'):
        fulllink = link.get('href')
        print fulllink #print in terminal to verify results

    tds = tr.find_all("td")


    try: #we are using "try" because the table is not well formatted. 
       names = str(tds[0].get_text()) 
       years = str(tds[1].get_text())
       positions = str(tds[2].get_text())
       parties = str(tds[3].get_text())
       states = str(tds[4].get_text())
       congress = tds[5].get_text()

       print names, years, positions, parties, states, congress

    except exc:
      print "bad tr string"

在python中，每个代码块都应使用tabs / space与缩进嵌套。混合它们并不好。

在你的代码中，你有一个第一个for循环，它将遍历所有tr和第二个打印所有URL。

但是你忘了缩进应该在for循环中的第一个块。

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此外，您不必在您的情况下使用继续。检查我的代码编辑。

Answer 2

缩进打印/继续查看。如果它关闭，则except：看起来像是空的，我不确定Python是否满意。

尝试注释掉与try / except无关的所有内容，看看它是否仍然会出错。

Python继续没有正确循环

2 个答案:

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