我的Python不是';无法正确读取XML
下面是我访问XML文件的python代码:我的Python不是';无法正确读取XML,python,xml,python-3.x,Python,Xml,Python 3.x,下面是我访问XML文件的python代码: import xml.etree.ElementTree as ET def display_book(book): root = ET.parse(source="library.xml") info = root.iter("catalog") for elem in info: name = elem.find("book").attrib['id'] if name == boo
import xml.etree.ElementTree as ET
def display_book(book):
root = ET.parse(source="library.xml")
info = root.iter("catalog")
for elem in info:
name = elem.find("book").attrib['id']
if name == book:
print(name)
return "Book Not Found"
#Main
display_book("bk105")
以下是XML代码的示例:
<catalog>
<book id="bk101">
<author>Gambardella, Matthew</author>
<title>XML Developer's Guide</title>
<genre>Computer</genre>
<price>44.95</price>
<publish_date>2000-10-01</publish_date>
<description>
An in-depth look at creating applications with XML.
</description>
</book>
<book id="bk102">
<author>Ralls, Kim</author>
<title>Midnight Rain</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2000-12-16</publish_date>
<description>
A former architect battles corporate zombies, an evil sorceress,
and her own childhood to become queen of the world.
</description>
</book>
</catalog>
马修·甘巴德拉
XML开发人员指南
电脑类
44.95
2000-10-01
深入了解如何使用XML创建应用程序。
拉尔斯,金
夜雨
幻想
5.95
2000-12-16
一位前建筑师与一位邪恶的女巫——企业僵尸战斗,
和她自己的童年成为世界女王。
这些书从“bk101”到“bk112”,代码只找到作为第一本书的“bk101”的id,而不是遍历每一个书id并与输入交叉引用,因此程序从不输出任何内容。甚至没有“找不到书”。elem.find(“书”)
只返回目录中的第一本书。您需要使用elem.findall(“book”)
,然后对它们进行迭代
但是您可以使用root.iter(“book”)
直接遍历这些书籍
for elem in root.iter("book"):
name = elem.attrib('id')
if name == book:
print(name)
else:
print("Book not found")
您还应该将错误消息放在
else:
块中。否则,即使找到该书,它也会被返回。您可以切换到使用findall
:
import xml.etree.ElementTree as ET
def display_book():
root = ET.parse(source="library.xml")
info = root.iter("catalog")
for elem in info:
books = elem.findall("book")
for book in books:
print book.attrib['id']
# Main
display_book()