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我正在尝试从已经存在的架子中读取键值对以创建具有更新字段的新类对象并将该类对象写入新架子。我的班级对象：SongDetails

这是失败的过程：

def updateShelfWithTabBody(shelfFileName, newShelfFileName):
     """this function updates songDetails with
     html body i.e. just the part that contains lyrics and
     chords in the tab """

 #read all songDetails
 shelf = shelve.open(shelfFileName)
 listOfKeys = shelf.keys()
 #create new songDetails object
 temporaryShelfObject = SongDetails.SongDetails()

 #iterate over list of keys
 for key in listOfKeys:
     #print "name:"+shelf[key].name
     #fill details from temporaryShelfObject
     temporaryShelfObject.name = shelf[key].name
     temporaryShelfObject.tabHtmlPageContent = shelf[key].tabHtmlPageContent
     #add new detail information
     htmlPageContent = shelf[key].tabHtmlPageContent
     temporaryShelfObject.htmlBodyContent = extractDataFromDocument.fetchTabBody(htmlPageContent)
     #write SongDetails back to shelf
     writeSongDetails.writeSongDetails(temporaryShelfObject, newShelfFileName)

上述代码中使用的函数的定义：

def fetchTabBody(page_contents):
    soup = BeautifulSoup(page_contents)
    HtmlBody = ""
    try:
            #The lyrics and chords of song are contained in div with id = "cont"
            #Note: This assumtption is specific to ultimate-guitar.com
            HtmlBody = soup.html.body.find("div",{"id":"cont"})
    except:
            print "Error: ",sys.exc_info()[0]
    return HtmlBody

def writeSongDetails(songDetails, shelfFileName):
    shelf = shelve.open(shelfFileName)
    songDetails.name = str(songDetails.name).strip(' ')
    shelf[songDetails.name] = songDetails
    shelf.close()

SongDetail类：

class SongDetails:
    name = ""
    tabHtmlPageContent = ""
    genre = ""
    year = ""
    artist = ""
    chordsAndLyrics = ""
    htmlBodyContent = ""
    scale = ""
    chordsUsed = []

这是我得到的错误：

Traceback (most recent call last):
File "/l/nx/user/ndhande/Independent_Study_Project_Git/Crawler/updateSongDetailsShelfWithNewAttributes.py", line 69, in <module>
updateShelfWithTabBody(shelfFileName, newShelfFileName)
File "/l/nx/user/ndhande/Independent_Study_Project_Git/Crawler/updateSongDetailsShelfWithNewAttributes.py", line 38, in updateShelfWithTabBody
writeSongDetails.writeSongDetails(temporaryShelfObject, newShelfFileName)
File "/home/nx/user/ndhande/Independent_Study_Project_Git/Crawler/writeSongDetails.py", line 7, in writeSongDetails
shelf[songDetails.name] = songDetails
File "/usr/lib64/python2.6/shelve.py", line 132, in __setitem__
p.dump(value)
File "/usr/lib64/python2.6/copy_reg.py", line 71, in _reduce_ex
state = base(self)
File "/u/ndhande/.local/lib/python2.6/site-packages/BeautifulSoup.py", line 476, in __unicode__
return str(self).decode(DEFAULT_OUTPUT_ENCODING)
**RuntimeError: maximum recursion depth exceeded**

即使我的代码中没有明确的递归调用，我也找不到任何原因导致我收到此错误。我在其他 stackoverflow 帖子中看到过这个错误，但他们确实有递归调用。

4

1 回答 1

0

str(self)来电__str__或__unicode__来电str(self)。

于 2013-09-10T11:35:43.233 回答