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我最近开始学习如何使用 python 来解析 xml 文件。我从http://pyxml.sourceforge.net/topics/howto/node12.html获取了教程

当我运行以下代码时,我收到错误:

Traceback (most recent call last):
  File "C:\Users\Name\Desktop\pythonxml\tutorials\pythonxml\pyxml sourceforge\5.1 Comic Colection\SearchForComic.py", line 30, in -toplevel-
    dh = FindIssue('sandman', '62')
TypeError: __init__() takes exactly 1 argument (3 given)

代码:

from xml.sax import saxutils

class FindIssue(saxutils.DefaultHandler):
    def __init___(self, title, number):
        self.search_title, self.search_number = title, number

def startElement(self, name, attrs):
    #if it's not a comic element, ignore it
    if name!= 'comic': return

        # look for the title and number sttributes (see text)
        title = attrs.get('title', None)
        number = attrs.get('number', None)
        if (title == self.search_title and
            number == self.search_number):
                print title, '#' +str (number), 'found'

from xml.sax import make_parser
from xml.sax.handler import feature_namespaces

if __name__ == '__main__':
        #Create a parser
        parser = make_parser()

    #tell the parser that we are not interested in XML namespaces
        parser.setFeature(feature_namespaces, 0)

    #create the handler
    dh = FindIssue('sandman', '62')

    #tell the parse to use our handler
    parser.setContentHandler(dh)

    #parse the input
    parser.parse('collection.xml')

同样在最后一行,我将文件传递到当前工作目录中,这是解决文件的正确方法吗?

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2 回答 2

8

_ init _名下的 _ 太多了。你的构造函数的声明应该是:

def __init__(self, title, number):

不是:

def __init___(self, title, number):

注意额外的下划线符号。

于 2012-08-10T15:53:31.517 回答
4

你有一个错字 - 这里有 3 个下划线:

def __init___(self, title, number):

应该:

def __init__(self, title, number):

因为它与 name 不完全匹配__init__,Python 只知道默认构造函数def __init__(self).

于 2012-08-10T15:54:15.000 回答