在Python中编码utf-8

# 将字符串编码为 UTF-8 字节
text = "你好，世界！"
encoded_bytes = text.encode('utf-8')
print(encoded_bytes)  # 输出: b'\xe4\xbd\xa0\xe5\xa5\xbd\xef\xbc\x8c\xe4\xb8\x96\xe7\x95\x8c\xef\xbc\x81'

# 将 UTF-8 字节解码为字符串
decoded_text = encoded_bytes.decode('utf-8')
print(decoded_text)  # 输出: 你好，世界！

text = "你好，世界！"

# 使用 UTF-8 编码写入文件
with open('example.txt', 'w', encoding='utf-8') as file:
    file.write(text)

# 使用 UTF-8 编码读取文件
with open('example.txt', 'r', encoding='utf-8') as file:
    content = file.read()
    print(content)  # 输出: 你好，世界！

import requests

response = requests.get('https://api.example.com/data')

# 假设响应内容是 UTF-8 编码的字节
data = response.content.decode('utf-8')
print(data)

import sys

# 获取命令行参数并解码
args = [arg.decode('utf-8') for arg in sys.argv[1:] if isinstance(arg, bytes)]
print(args)

# 假设有一个 GBK 编码的字节字符串
gbk_bytes = b'\xca\xc0\xbd\xe7\xa3\xa1\xc2\xeb'

# 先解码为 Unicode 字符串，再编码为 UTF-8
utf8_bytes = gbk_bytes.decode('gbk').encode('utf-8')
print(utf8_bytes)  # 输出: b'\xe4\xb8\x96\xe7\x95\x8c'