2 篇文章带有标签 “stdlib”

在 Python 中解析和修改 XML

XML 数据

xml_data = '''<?xml version="1.0" encoding="UTF-8"?>
<books>
    <book SN="12460901">
        <name>国富论</name>
        <author nation="English">亚当·斯密</author>
        <price>108</price>
        <ISBN>9787511373229</ISBN>
    </book>
    <book SN="12257413">
        <name>原则</name>
        <author nation="America">瑞·达利欧</author>
        <price>98</price>
        <ISBN>9787508684031</ISBN>
    </book>
</books>
'''

xml.etree.ElementTree 导入 import xml.

pythonxmlelementtreeparsingstdlib

使用 Python 临时文件模块

file.write() 内容超过 4K 才会写入磁盘

验证代码

import os
import tempfile

for count in range(1, 4100):
    content = '0'*count
    with tempfile.NamedTemporaryFile() as file:
        print(file.name)
        file.write(content.encode())

        with open(file.name, 'r') as tf:
            content_len = len(tf.read())
            if content_len > 0:
                print(f'{count} bytes written successfully.')

运行结果 /var/folders/bc/7lz308t90gb1h1xw6k4j65x80000gn/T/tmpj458ozas /var/folders/bc/7lz308t90gb1h1xw6k4j65x80000gn/T/tmpmrxo8sg1 /var/folders/bc/7lz308t90gb1h1xw6k4j65x80000gn/T/tmp0hu_i4hz 4097 bytes written successfully.

pythontempfilefile-iostdlibfile