Python 元素树写入新文件

Python Element Tree Writing to New File(Python 元素树写入新文件)

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问题描述

所以我一直在努力解决这个问题,但不太明白为什么我会收到错误.试图将一些基本的 XML 导出到一个新文件中,一直给我一个 TypeError.下面是代码的一个小示例

Hi so I've been struggling with this and can't quite figure out why I'm getting errors. Trying to export just some basic XML into a new file, keeps giving me a TypeError. Below is a small sample of the code

from xml.etree.ElementTree import ElementTree
from xml.etree.ElementTree import Element
from xml.etree.ElementTree import SubElement
import xml.etree.ElementTree as ET


root = Element('QuoteWerksXML')
tree = ElementTree(root)
ver = SubElement(root, "AppVersionMajor")
ver.text = '5.1'

tree.write(open('person.xml', 'w'))

推荐答案

ElementTree.write 方法默认为 us-ascii 编码,因此需要打开一个用于写入二进制文件的文件:

The ElementTree.write method defaults to us-ascii encoding and as such expects a file opened for writing binary:

输出是字符串(str)或二进制(字节).这是由 encoding 参数控制的.如果 encodingunicode",则输出是一个字符串;否则,它是二进制的.请注意,如果它是一个打开的文件对象,这可能会与 file 的类型冲突;确保不要尝试将字符串写入二进制流,反之亦然.

The output is either a string (str) or binary (bytes). This is controlled by the encoding argument. If encoding is "unicode", the output is a string; otherwise, it’s binary. Note that this may conflict with the type of file if it’s an open file object; make sure you do not try to write a string to a binary stream and vice versa.

所以要么以二进制模式打开文件进行写入:

So either open the file for writing in binary mode:

with open('person.xml', 'wb') as f:
    tree.write(f)

或打开文件以文本模式写入并给出unicode"作为编码:

or open the file for writing in text mode and give "unicode" as encoding:

with open('person.xml', 'w') as f:
    tree.write(f, encoding='unicode')

或以二进制模式打开文件进行写入并传递显式编码:

or open the file for writing in binary mode and pass an explicit encoding:

with open('person.xml', 'wb') as f:
    tree.write(f, encoding='utf-8')

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