我为什么会用BeautifulSoup和IDLE一个递归错误？ [英] Why do I get a recursion error with BeautifulSoup and IDLE?

问题描述

我下面的教程来尝试学习如何使用BeautifulSoup。我想一个HTML页面我下载上删除的URL的名称。我有这一点伟大的工作。

 从BS4进口BeautifulSoup汤= BeautifulSoup（开放（43-congress.html））final_link = soup.p.a
final_link.decompose（）链接= soup.find_all（'A'）在链接的链接：
    打印链接
 

但是当我进入这个下一部分

 从BS4进口BeautifulSoup汤= BeautifulSoup（开放（43-congress.html））final_link = soup.p.a
final_link.decompose（）链接= soup.find_all（'A'）在链接的链接：
    名称= link.contents [0]
    丰联= link.get（'href属性）
    打印名称
    打印丰联
 

我得到这个错误

 回溯（最后最近一次调用）：
  文件C：/ Python27 / Python的教程/ soupexample.py，13号线，上述＆lt;＆模块GT;
    打印名称
  文件C：\\ Python27 \\ lib目录\\ idlelib \\ PyShell.py，线路1325，在写
    返回self.shell.write（S，self.tags）
  文件C：\\ Python27 \\ lib目录\\ idlelib \\ rpc.py，595线，在__call__
    值= self.sockio.remotecall（self.oid，self.name，ARGS，kwargs）
  文件C：\\ Python27 \\ lib目录\\ idlelib \\ rpc.py，210线，在为RemoteCall
    SEQ = self.asynccall（OID，方法名，ARGS，kwargs）
  文件C：\\ Python27 \\ lib目录\\ idlelib \\ rpc.py，225线，在asynccall
    self.putmessage（（SEQ，要求））
  文件C：\\ Python27 \\ lib目录\\ idlelib \\ rpc.py，324线，在PUTMESSAGE
    S = pickle.dumps（消息）
  文件C：\\ Python27 \\ lib目录\\ copy_reg.py，第74行，在_reduce_ex
    =有getstate自我.__ getstate__
RuntimeError：最大递归深度超过
 

解决方案

这是空闲和BeautifulSoup的 NavigableString 对象（子类之间的越野车互动UNI code ）。请参见问题1757057 ;它已经有一段时间了。

的解决办法是将对象转换为纯UNI code值第一：

 打印UNI code（地名）
 

I am following a tutorial to try to learn how to use BeautifulSoup. I am trying to remove names from the urls on a html page I downloaded. I have it working great to this point.

from bs4 import BeautifulSoup

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

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

links = soup.find_all('a')

for link in links:
    print link

but when I enter this next part

from bs4 import BeautifulSoup

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

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

links = soup.find_all('a')

for link in links:
    names = link.contents[0]
    fullLink = link.get('href')
    print names
    print fullLink

I get this error

Traceback (most recent call last):
  File "C:/Python27/python tutorials/soupexample.py", line 13, in <module>
    print names
  File "C:\Python27\lib\idlelib\PyShell.py", line 1325, in write
    return self.shell.write(s, self.tags)
  File "C:\Python27\lib\idlelib\rpc.py", line 595, in __call__
    value = self.sockio.remotecall(self.oid, self.name, args, kwargs)
  File "C:\Python27\lib\idlelib\rpc.py", line 210, in remotecall
    seq = self.asynccall(oid, methodname, args, kwargs)
  File "C:\Python27\lib\idlelib\rpc.py", line 225, in asynccall
    self.putmessage((seq, request))
  File "C:\Python27\lib\idlelib\rpc.py", line 324, in putmessage
    s = pickle.dumps(message)
  File "C:\Python27\lib\copy_reg.py", line 74, in _reduce_ex
    getstate = self.__getstate__
RuntimeError: maximum recursion depth exceeded

解决方案

This is a buggy interaction between IDLE and BeautifulSoup's NavigableString objects (which subclass unicode). See issue 1757057; it's been around for a while.

The work-around is to convert the object to a plain unicode value first:

print unicode(names)

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