如何用MicrosoftGraphAPI计算前一天收到的邮件数量？

1. 首先要获取前一天的日期和今天的日期：

import datetime

today = datetime.date.today()
yesterday = today - datetime.timedelta(days=1)

2. 接着，使用 Microsoft Graph API 的 /me/messages 终端节点和 $filter 参数来查询前一天收到的邮件数量：

import requests

access_token = 'YOUR_ACCESS_TOKEN_HERE'

url = f'https://graph.microsoft.com/v1.0/me/messages?$filter=receivedDateTime%20ge%20{yesterday}%20and%20receivedDateTime%20lt%20{today}'
headers = {'Authorization': f'Bearer {access_token}'}

response = requests.get(url, headers=headers)
if response.status_code == 200:
    messages = response.json()
    message_count = messages['@odata.count']
    print(f'There were {message_count} messages received yesterday.')
else:
    print(f'There was an error: {response.text}')

其中 access_token 是你的 Microsoft Graph API 访问令牌，获取方式请参照官方文档。receivedDateTime 是收件日期时间，在这个例子中使用了两个过滤条件：大于等于昨天且小于今天。

3. 执行上述代码，屏幕上将输出前一天收到的邮件数量。