Question

我试图在xml文件内容中搜索正则表达式模式，并发现如何传递始终以数字结尾的子字符串的问题（这是在xml文件中是动态的部分所以，不知道如何创建一个模式和搜索）。

找到模式后，我需要获取它的子标签项，即attrib和文本值。

xml文件内容：

         <author NAME="PYTHON_DD101">
             <type>BOOK</type>
             <ID>59</ID>
             <inst ID="A">Garry</inst>
             <inst ID="B">Gerald</inst>
         </author>
         <author NAME="PYTHON_ABC4">
             <type>BOOK</type>
             <SrcID>62</SrcID>
             <inst ID="A">Niel</inst>
             <inst ID="B">Long</inst>
         </author>

代码：

text = "PYTHON"
tmp = '"' + text + "_ABC" + '"'
print(tmp)
#pattern = re.compile('%s\d+'%tmp)
endsWithNumber = re.compile('%s\d$'%tmp)
print(endsWithNumber)
#FoundDetails = Content.find("PYTHON_ABC4")
FoundDetails = Content.find(".//author[@NAME='{}']".format(endsWithNumber))
#regex = re.compile('%s\d+'%tmp)
#matches = regex.match(Content)
#print(matches)
print(type(Content))      
print(type(FoundDetails))
print(FoundDetails)
for FoundDetails in FoundDetails.iterfind('author'):
    author = FoundDetails.attrib['NAME']
    print 'author:', author
for inst in FoundDetails.iterfind('inst'):
    print 'inst id:', inst.attrib['ID'], 'inst name:', inst.text

错误：

PYTHON_ABC
<_sre.SRE_Pattern object at 0x000000000403F168>
<class 'xml.etree.ElementTree.Element'>
<type 'NoneType'>
None
Traceback (most recent call last):
  File "C:\test_Book.py", line 45, in <module>
    bookauthor = book.get_Book_by_author(Book)
  File "C:\Book.py", line 219, in get_Book_by_author
    for FoundDetails in FoundDetails.iterfind('author'):
AttributeError: 'NoneType' object has no attribute 'iterfind'

预期产出：

inst id: A inst name: Niel
inst id: B inst name: Long

如果我传递完全NAME值，即下面一行中的“PYTHON_ABC4”，它可以工作，但我不想传递硬编码值，因为文件中可能有其他实例有可能具有相同模式的名称例如：“PYTHON_ABC12”那个案例我也希望得到那些书的细节。

FoundDetails = Content.find(".//author[@NAME='{}']".format("PYTHON_ABC4"))

Answer 1

我稍微修改了你的代码，以获得所需的输出，希望它有所帮助

data='''
<PARAMETER-VALUES>
<author NAME="PYTHON_DD11">
             <type>BOOK</type>
             <ID>59</ID>
             <inst ID="A">Garry</inst>
             <inst ID="B">Gerald</inst>
         </author>
         <author NAME="PYTHON_ABC4">
             <type>BOOK</type>
             <SrcID>62</SrcID>
             <inst ID="A">Niel</inst>
             <inst ID="B">Long</inst>
         </author>
</PARAMETER-VALUES>
'''




#Element tree to parse the xml data

import xml.etree.ElementTree as ET
import re
root=ET.fromstring(data)

# A function to verify if the node is alphanumeric

def hasnumbers(result):
    return bool(re.search(r'\d', result))

for author in root.iter('author'):
    result=author.attrib.get('NAME')
    b=hasnumbers(result)
    if b==True:
        for inst in author.iterfind('inst'):
            print 'inst id:',inst.attrib.get('ID'),'inst name:',inst.text

输出

inst id: A inst name: Garry
inst id: B inst name: Gerald
inst id: A inst name: Niel
inst id: B inst name: Long

如何使用python在xml文件中搜索XPATH中的部分子字符串或正则表达式

1 个答案: