Python 使用元素树读取xml文件
我有一个xml文件。 看起来,Python 使用元素树读取xml文件,python,xml,elementtree,Python,Xml,Elementtree,我有一个xml文件。 看起来, <root> <Group> <ChapterNo>1</ChapterNo> <ChapterName>A</ChapterName> <Line>1</Line> <Content>zfsdfsdf</Content> <Synonyms>fdgd
<root>
<Group>
<ChapterNo>1</ChapterNo>
<ChapterName>A</ChapterName>
<Line>1</Line>
<Content>zfsdfsdf</Content>
<Synonyms>fdgd</Synonyms>
<Translation>assdfsdfsdf</Translation>
</Group>
<Group>
<ChapterNo>1</ChapterNo>
<ChapterName>A</ChapterName>
<Line>2</Line>
<Content>ertreter</Content>
<Synonyms>retreter</Synonyms>
<Translation>erterte</Translation>
</Group>
<Group>
<ChapterNo>2</ChapterNo>
<ChapterName>B</ChapterName>
<Line>1</Line>
<Content>sadsafs</Content>
<Synonyms>sdfsdfsd</Synonyms>
<Translation>sdfsdfsd</Translation>
</Group>
<Group>
<ChapterNo>2</ChapterNo>
<ChapterName>B</ChapterName>
<Line>2</Line>
<Content>retete</Content>
<Synonyms>retertret</Synonyms>
<Translation>retertert</Translation>
</Group>
</root>
但它显示了一个错误
ChapterNo=root.find('ChapterNo').text
AttributeError: 'NoneType' object has no attribute 'text'`
现在我想得到所有的ChapterNo,ChapterName等都分别使用元素树,我想把这些数据插入到数据库中。。。。有人能帮我吗
Rgds
Nimmy
ChapterNo
不是root
的直接子级,因此root.find('ChapterNo')
无法工作。您需要使用xpath语法来查找数据
此外,ChapterNo、ChapterName等也有多次出现,因此您应该使用findall
并遍历结果,以获得每个结果的文本
chapter_nos = [e.text for e in root.findall('.//ChapterNo')]
依此类推。这里有一个小示例,用于定义一个对象,该对象将提取数据并将其存储在数据库中
from sqlalchemy import create_engine, Unicode, Integer, Column, UnicodeText
from sqlalchemy.orm import create_session
from sqlalchemy.ext.declarative import declarative_base
engine = create_engine('sqlite:///chapters.sqlite', echo=True)
Base = declarative_base(bind=engine)
class ChapterLine(Base):
__tablename__ = 'chapterlines'
chapter_no = Column(Integer, primary_key=True)
chapter_name = Column(Unicode(200))
line = Column(Integer, primary_key=True)
content = Column(UnicodeText)
synonyms = Column(UnicodeText)
translation = Column(UnicodeText)
@classmethod
def from_xmlgroup(cls, element):
l = cls()
l.chapter_no = int(element.find('ChapterNo').text)
l.chapter_name = element.find('ChapterName').text
l.line = int(element.find('Line').text)
l.content = element.find('Content').text
l.synonyms = element.find('Synonyms').text
l.translation = element.find('Translation').text
return l
Base.metadata.create_all() # creates the table
以下是如何使用它:
from xml.etree import ElementTree as etree
session = create_session(bind=engine, autocommit=False)
doc = etree.parse('myfile.xml').getroot()
for group in doc.findall('Group'):
l = ChapterLine.from_xmlgroup(group)
session.add(l)
session.commit()
我已经在您的xml数据中测试了这段代码,它运行良好,可以将所有内容插入到数据库中。要解析简单的两级数据结构并为每个组组装dict,您只需执行以下操作:
from sqlalchemy import create_engine, Unicode, Integer, Column, UnicodeText
from sqlalchemy.orm import create_session
from sqlalchemy.ext.declarative import declarative_base
engine = create_engine('sqlite:///chapters.sqlite', echo=True)
Base = declarative_base(bind=engine)
class ChapterLine(Base):
__tablename__ = 'chapterlines'
chapter_no = Column(Integer, primary_key=True)
chapter_name = Column(Unicode(200))
line = Column(Integer, primary_key=True)
content = Column(UnicodeText)
synonyms = Column(UnicodeText)
translation = Column(UnicodeText)
@classmethod
def from_xmlgroup(cls, element):
l = cls()
l.chapter_no = int(element.find('ChapterNo').text)
l.chapter_name = element.find('ChapterName').text
l.line = int(element.find('Line').text)
l.content = element.find('Content').text
l.synonyms = element.find('Synonyms').text
l.translation = element.find('Translation').text
return l
Base.metadata.create_all() # creates the table
>>> # what you did to get `root`
>>> from pprint import pprint as pp
>>> for group in root:
... d = {}
... for elem in group:
... d[elem.tag] = elem.text
... pp(d) # or whack it ito a database
...
{'ChapterName': 'A',
'ChapterNo': '1',
'Content': 'zfsdfsdf',
'Line': '1',
'Synonyms': 'fdgd',
'Translation': 'assdfsdfsdf'}
{'ChapterName': 'A',
'ChapterNo': '1',
'Content': 'ertreter',
'Line': '2',
'Synonyms': 'retreter',
'Translation': 'erterte'}
{'ChapterName': 'B',
'ChapterNo': '2',
'Content': 'sadsafs',
'Line': '1',
'Synonyms': 'sdfsdfsd',
'Translation': 'sdfsdfsd'}
{'ChapterName': 'B',
'ChapterNo': '2',
'Content': 'retete',
'Line': '2',
'Synonyms': 'retertret',
'Translation': 'retertert'}
>>>
听着,妈,不要 我试过。。。。。。。。。root=ElementTree.parse('data.xml')。getroot()ChapterNo=root.find('ChapterNo')。text ChapterName=root.find('ChapterName')。text GitaLine=root.find('Line')。text Content=root.find('Content')。text同义词=root.find('Synonyms')。text Translation=root.find('Translation')。text But is显示错误“ChapterNo=root.find('ChapterNo')。text AttributeError:'NoneType'对象没有属性'text'”将这一点添加到您的问题中,在注释中很难阅读。
root.find('GitaLine')
示例中没有文本“GitaLine”。请注意,在大型XML文档中,/root/Group/ChapterNo
比/ChapterNo
更快。