Google Calendar API Python：无法删除群组日历事件

你的代码核心问题在于删除事件时直接使用requests.delete()发送请求，但这个请求没有携带OAuth2认证凭证。虽然你已经通过credentials.authorize(httplib2.Http())获取了授权的HTTP客户端并构建了Calendar服务对象，但requests库和这个授权客户端完全无关，导致API请求因缺少认证信息返回401错误。而你能正常创建事件，应该是创建逻辑用了service对象的方法（自动携带认证），和删除的错误逻辑形成对比。

修正方案 #

直接使用Google Calendar API提供的Python客户端库方法执行删除操作，无需手动调用requests。修改后的代码如下：

from __future__ import print_function
import httplib2
import os

from apiclient import discovery
from oauth2client import file
import oauth2client
from oauth2client import client
from oauth2client import tools

import datetime

SCOPES = 'https://www.googleapis.com/auth/calendar'
CLIENT_SECRET_FILE = 'credentials.json'
APPLICATION_NAME = 'Google Calendar API Python Quickstart'
calendar_use = 'XXXXXXX@group.calendar.google.com'

def get_credentials():
    """Gets valid user credentials from storage.

    If nothing has been stored, or if the stored credentials are invalid,
    the OAuth2 flow is completed to obtain the new credentials.

    Returns:
        Credentials, the obtained credential.
    """
    home_dir = os.path.expanduser('~')
    credential_dir = os.path.join(home_dir, '.credentials')
    if not os.path.exists(credential_dir):
        os.makedirs(credential_dir)
    credential_path = os.path.join(credential_dir,'calendar-python-quickstart.json')

    store = oauth2client.file.Storage(credential_path)
    credentials = store.get()
    if not credentials or credentials.invalid:
        flow = client.flow_from_clientsecrets(CLIENT_SECRET_FILE, SCOPES)
        flow.user_agent = APPLICATION_NAME
        try:
            import argparse
            flags = argparse.ArgumentParser(parents=[tools.argparser]).parse_args()
        except ImportError:
            flags = None
        if flags:
            credentials = tools.run_flow(flow, store, flags)
        else: # Needed only for compatibility with Python 2.6
            credentials = tools.run(flow, store)
        print('Storing credentials to ' + credential_path)
    return credentials

def deleteEvent():
    credentials = get_credentials()
    http = credentials.authorize(httplib2.Http())
    service = discovery.build('calendar', 'v3', http=http)
    
    # 使用API客户端库的delete方法，自动携带认证
    event_id = 'xxxxxxxxxxxxxxxxx'  # 替换为你的事件ID
    service.events().delete(
        calendarId=calendar_use,
        eventId=event_id
    ).execute()
    print("事件删除成功")

deleteEvent()

关键修改点 #

1. 移除了无用的requests库导入
2. 删除事件时使用service.events().delete()方法，传入群组日历ID和目标事件ID，该方法会自动使用已授权的HTTP客户端发送请求，无需手动处理认证头
3. 补充了flags的初始化逻辑（原代码中flags变量未定义，可能导致额外报错）

内容的提问来源于stack exchange，提问作者Aragor