Question

我是python的新手。现在它的Python 2.7

我在elementTree中处理xml并使用Mongodb。我要处理的XML是“http://www.sec.gov/Archives/edgar/usgaap.rss.xml” 下面是代码：

import os
import cgi
import sqlite3 as litefire
import sys
sys.stderr = sys.stdout
from xml.etree import ElementTree
from pymongo import Connection
connc2=Connection('localhost',27017)
db2=connc2['rss']
rss=db2.rss

xmlrss=[]
treexsdr = ElementTree.parse('xbrlrss_all.xml')
i=0
k=0
o=0
o2=0
iter = treexsdr.getiterator()

for element in iter:
    if element.tag:
        o=i+k
        xmlname=element.tag
    if element.keys():
        attributedict = dict(element.items())
        for name, value in element.items():
            krishna=element.items()
    if element.text:
        text = element.text

    xmlnamelist={"xmlname":xmlname,"text":text,"ownid":o,"parentid":o2,"xmlattkeys":{k:v for k,v in krishna}}

    xmlrss.append(xmlnamelist)

    if element.getchildren():
        o2=o
        for child in element:
            k=k+1
    i=i+1

rss.insert(xmlrss)

当我申请krishna = dict（element.items（））时，我在IDE中收到错误消息：

Message File Name   Line    Position    
Traceback               
    <module>    D:\test\mongo_rss.py    44      
    insert  C:\Python27\lib\site-packages\pymongo\collection.py 312     
InvalidDocument: key '{http://www.sec.gov/Archives/edgar}file' must not contain '.'

如果krishna = element.items（），那么在mongodb我得到：

{
  "_id" : ObjectId("4f69bb6e17ea930fd803a958"),
  "text" : "en-us",
  "xmlname" : "language",
  "xmlattkeys" : [["href", "http://www.sec.gov/Archives/edgar/xbrlrss.all.xml"], ["type", "application/rss+xml"], ["rel", "self"]],
  "parentid" : 2,
  "ownid" : 16
}

但我想要

{
  "_id" : ObjectId("4f69bb6e17ea930fd803a958"),
  "text" : "en-us",
  "xmlname" : "language",
  "xmlattkeys" : {"href":"http://www.sec.gov/Archives/edgar/xbrlrss.all.xml", "type":"application/rss+xml", "rel":"self"},
  "parentid" : 2,
  "ownid" : 16
}

请帮助我这样做。

Answer 1

而不是

for name, value in element.items():
    krishna=element.items()

DO

krishna = dict(element.items())

（也许可以考虑为这个变量使用更具描述性的名称。）

Answer 2

你可以使用词典理解：

xmlnamelist={"xmlname":xmlname,"text":text,"xmlattkeys": {k:v for k,v in krishna}}

Answer 3

你可以试试这个

 xmlnamelist={"xmlname":xmlname,"text":text,"xmlattkeys":dict(krishna)}

特殊形式（iterables列表）应该允许它。更多更正：

for element in iter:
    xmlname = element.tag if element.tag else ""
    attributedict = dict(element.items()) if element.keys() else {}
    text = element.text if element.text else ""
    xmlnamelist = {"xmlname"    :xmlname,
                   "text"       :text,
                   "xmlattkeys" :attributedict}
    xmlrss.append(xmlnamelist)

请注意，您需要提供默认值，否则您可能会声明变量未声明或填充旧（错误）值。

如何将列表项转换为python / mongodb / elementTree中的相应dict

3 个答案: