使用 Python + 百度翻译 API 批量翻译 po 文件

前言

本文介绍如何用 Python 调用百度翻译开放接口，批量翻译 gettext 的 .po 文件：按行读取原文，用 appid + 盐 + appkey 生成 MD5 签名发起请求，再借 tqdm 显示进度条，把译文写入新文件。使用前需先到百度翻译开放平台申请 appid 和 appkey，并填入脚本末尾的配置区。

安装python环境

pip install tqdm

第一版

import requests
import random
import json
from hashlib import md5
from tqdm import tqdm  # 导入 tqdm 库，用于显示进度条

def make_md5(s, encoding='utf-8'):
    return md5(s.encode(encoding)).hexdigest()

def translate_po_file(input_file, output_file, from_lang, to_lang, appid, appkey):
    # Set Baidu translation API endpoint
    endpoint = 'http://api.fanyi.baidu.com/api/trans/vip/translate'
    
    # Generate salt for request
    salt = random.randint(32768, 65536)
    
    # Open input and output files
    with open(input_file, 'r', encoding='utf-8') as fin, open(output_file, 'w', encoding='utf-8') as fout:
        # Get total number of lines in the input file
        total_lines = sum(1 for line in fin)
        fin.seek(0)  # Reset file pointer to beginning
        
        for line in tqdm(fin, total=total_lines, desc='Translating'):  # 使用 tqdm 包装循环
            # Clean and prepare the line for translation
            line = line.strip()
            
            # Generate sign for the request
            sign = make_md5(appid + line + str(salt) + appkey)
            
            # Build the translation request payload
            payload = {
                'appid': appid,
                'q': line,
                'from': from_lang,
                'to': to_lang,
                'salt': salt,
                'sign': sign
            }
            
            # Send translation request
            response = requests.post(endpoint, params=payload)
            translation_result = response.json()
            
            # Extract translated text from the response
            translated_text = translation_result.get('trans_result', [{}])[0].get('dst', line)
            
            # Write translated text to the output file
            fout.write(f'{translated_text}\n')

if __name__ == '__main__':
    # Configuration
    input_po_file = '' #翻译文件的路径
    output_po_file = '' #翻译完保存的路径
    from_lang = 'en' #翻译文件的语言
    to_lang = 'zh' #翻译成什么语言
    appid = '' #百度翻译API的appid
    appkey = '' #百度翻译API的appkey

    # Translate the PO file
    translate_po_file(input_po_file, output_po_file, from_lang, to_lang, appid, appkey)

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