如何使用 Python 下载每封 Gmail 电子邮件？

Posted 2023-03-25

【中文标题】如何使用 Python 下载每封 Gmail 电子邮件？

【英文标题】：How do I download every Gmail email with Python?

【发布时间】：2021-04-09 03:09:43

【问题描述】：

我想用尽可能少的 API 调用来下载它们。 https://github.com/googleapis/google-api-python-client/tree/master/samples 没有 Gmail。

【参考方案1】：

从关注Python quickstart 开始，它将让您了解如何使 Auth 部分正常工作

from __future__ import print_function
import pickle
import os.path
from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request

# If modifying these scopes, delete the file token.pickle.
SCOPES = ['https://www.googleapis.com/auth/gmail.readonly']

def main():
    """Shows basic usage of the Gmail API.
    Lists the user's Gmail labels.
    """
    creds = None
    # The file token.pickle stores the user's access and refresh tokens, and is
    # created automatically when the authorization flow completes for the first
    # time.
    if os.path.exists('token.pickle'):
        with open('token.pickle', 'rb') as token:
            creds = pickle.load(token)
    # If there are no (valid) credentials available, let the user log in.
    if not creds or not creds.valid:
        if creds and creds.expired and creds.refresh_token:
            creds.refresh(Request())
        else:
            flow = InstalledAppFlow.from_client_secrets_file(
                'credentials.json', SCOPES)
            creds = flow.run_local_server(port=0)
        # Save the credentials for the next run
        with open('token.pickle', 'wb') as token:
            pickle.dump(creds, token)

    service = build('gmail', 'v1', credentials=creds)

    # Call the Gmail API
    results = service.users().labels().list(userId='me').execute()
    labels = results.get('labels', [])

    if not labels:
        print('No labels found.')
    else:
        print('Labels:')
        for label in labels:
            print(label['name'])

if __name__ == '__main__':
    main()

一旦您了解这是做什么的，您应该可以咨询 user message list 以了解如何更改它以列出消息。