writer.writerow 将 XML 解析为 CSV

Question

与我之前的帖子一样，我正在尝试解析 XML 文件。文件是：

<?xml version="1.0" ?>

<library>
 <book>
  <title>Sandman Volume 1: Preludes and Nocturnes</title>
  <author>Neil Gaiman</author>
 </book>
 <book>
  <title>Good Omens</title>
  <author>Neil Gamain</author>
  <author>Terry Pratchett</author>
  </book>
 <book>
  <title>All the Lovely Things</title>
  <author>James Daniel Wise</author>
 </book>
 <book>
  <title>Beginning Python</title>
  <author>Peter Norton, et al</author>
 </book>
</library>

我的 Python 脚本是：

from xml.dom.minidom import parse
import xml.dom.minidom
import csv

def writeToCSV(myLibrary):
    with open('csvout.csv', 'wb') as csvfile:
        writer = csv.writer(csvfile, delimiter = ',')
        writer.writerow(['title', 'author', 'author'])
        books = myLibrary.getElementsByTagName("book")
        for book in books:
            titleValue = book.getElementsByTagName("title")[0].childNodes[0].data
            authors =[]
            for author in book.getElementsByTagName("author"):
                authors.append(author.childNodes[0].data)   
            writer.writerow([titleValue] + authors)

doc = parse('library.xml')
myLibrary = doc.getElementsByTagName("library")[0]

# Call main function
writeToCSV(myLibrary)

这给了我这个输出：

title,author,author
Sandman Volume 1: Preludes and Nocturnes,Neil Gaiman
Good Omens,Neil Gamain,Terry Pratchett
All the Lovely Things,James Daniel Wise
Beginning Python,"Peter Norton, et al"

首先我想知道为什么它在最后一行“Peter Norton, et al”周围加上引号，以及如何摆脱这个！将 QUOTE_NONE 放在我的代码中可以防止此行被返回。

另外，我想添加另一个列标题“键”。我希望它由序列号填充，以给我这个输出：

key,title,author,author
1,Sandman Volume 1: Preludes and Nocturnes,Neil Gaiman
2,Good Omens,Neil Gamain,Terry Pratchett
3,All the Lovely Things,James Daniel Wise
4,Beginning Python,Peter Norton, et al

我尝试了各种方法，例如设置“key”变量 = 0，然后在我的 def 循环中执行 key=+1，但它不起作用。

Answer 1

首先，试试这个（可能是你期望的程序）。可以从itertools 导入计数器设置为key

from xml.dom.minidom import parse
import xml.dom.minidom
import csv
from itertools import count
c = count(1) #starts from 1
def writeToCSV(myLibrary):
    with open('csvout.csv', 'wb') as csvfile:
        writer = csv.writer(csvfile, delimiter = ',')
        writer.writerow(['key', 'title', 'author', 'author']) #added key
        books = myLibrary.getElementsByTagName("book")
        for book in books:
            titleValue = book.getElementsByTagName("title")[0].childNodes[0].data
            authors =[]
            for author in book.getElementsByTagName("author"):
                authors.append(author.childNodes[0].data) 
            writer.writerow([c.next()] + [titleValue] + authors)

doc = parse('library.xml')
myLibrary = doc.getElementsByTagName("library")[0]

那么为什么是quotes around the last line "Peter Norton, et al"？

由于您使用的是delimeter= ","，因此该名称包含,。所以"" 用于在csv file 中充当单个string