如何使用python从gmail下载特定主题和日期的电子邮件附件

pip install google-auth google-auth-oauthlib google-auth-httplib2

import os
import base64
from google.oauth2.credentials import Credentials
from google_auth_oauthlib.flow import InstalledAppFlow
from googleapiclient.discovery import build

# Gmail API凭据文件路径
credentials_path = 'path/to/credentials.json'

# 定义要下载的邮件主题和日期范围
search_subject = 'Your Email Subject'
search_date = '2022/10/01'  # 格式为YYYY/MM/DD

# 认证和授权
flow = InstalledAppFlow.from_client_secrets_file(
    credentials_path, ['https://www.googleapis.com/auth/gmail.readonly'])
credentials = flow.run_local_server(port=0)

# 构建Gmail API客户端
service = build('gmail', 'v1', credentials=credentials)

# 搜索特定主题和日期范围的邮件
response = service.users().messages().list(userId='me',
                                           q=f'subject:{search_subject} after:{search_date}').execute()
messages = response.get('messages', [])

# 下载附件
for message in messages:
    msg = service.users().messages().get(userId='me', id=message['id']).execute()
    for part in msg['payload']['parts']:
        if 'filename' in part:
            file_data = base64.urlsafe_b64decode(part['body']['attachmentId'])
            file_path = os.path.join('path/to/save', part['filename'])
            with open(file_path, 'wb') as f:
                f.write(file_data)
            print(f'Downloaded attachment: {part["filename"]}')