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python - 检查谷歌日历中是否已经存在谷歌事件

问题描述

我希望能够验证输入日期+小时是否已经在谷歌日历中创建。

这是我得到的代码，但我现在卡住了（谷歌快速入门教程）。此代码为我提供了 10 个即将发生的事件。

但我想要的是能够输入一个日期，然后在添加之前验证事件是否已经存在。

from __future__ import print_function
import datetime
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/calendar']


def main():
    """Shows basic usage of the Google Calendar API.
    Prints the start and name of the next 10 events on the user's calendar.
    """
    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('calendar', 'v3', credentials=creds)

    # Call the Calendar API
    now = datetime.datetime.utcnow().isoformat() + 'Z' # 'Z' indicates UTC time
    print('Getting the upcoming 10 events')
    events_result = service.events().list(calendarId='primary', timeMin=now,
                                        maxResults=10, singleEvents=True,
                                        orderBy='startTime').execute()
    events = events_result.get('items', [])

    if not events:
        print('No upcoming events found.')
    for event in events:
        start = event['start'].get('dateTime', event['start'].get('date'))
        print(start, event['summary'], event['location'])


if __name__ == '__main__':
    main()

编辑：

我尝试了此代码，但出现错误。

events_result = service.events().list(calendarId='primary', timeMin="2020-04-22T10:00:00-00:00",
                                          timeMax="2020-04-22T12:00:00-00:00",
                                          singleEvents=True,
                                          orderBy='startTime').execute()
    events = events_result.get('items', [])

    if not events:
        print('Event does not exist yet.')
    else:
        for event in events:
            start = event['start'].get('dateTime', event['start'].get('date'))
            if start == "2020-04-22T11:00:00-00:00":
                found = True
                print('Event has been found.')
                break
        if found != True:
            print('Event does not exist yet.')

我得到的错误：

Traceback (most recent call last):
  File "/Users/cn/PycharmProjects/Calendrier/venv/quickstart.py", line 61, in <module>
    main()
  File "/Users/cn/PycharmProjects/Calendrier/venv/quickstart.py", line 56, in main
    if found != True:
UnboundLocalError: local variable 'found' referenced before assignment

标签： pythongoogle-calendar-api

解决方案

Calendar API 提供日期指定参数timeMin和timeMax

说明：

timeMax: 过滤事件开始时间的上限（不包括）。

timeMin：过滤事件的结束时间的下限（不包括）。

  • 不幸的是，这些参数不允许您直接找到您要查找的确切日期和时间，但您可以使用它们来尽可能缩小结果列表（了解事件摘要也会有很大帮助！）。
  • 获得所有可能结果的列表后，您需要遍历它们并验证每个结果event['start'].get('dateTime', event['start'].get('date'))是否等于您要查找的结果。

示例片段

events_result = service.events().list(calendarId='primary', timeMin=now, 
                                        timeMax="Specify if possible",
                                        singleEvents=True,
                                        orderBy='startTime').execute()
    events = events_result.get('items', [])

    if not events:
        print('Event does not exist yet.')
    else:
        found = False
        for event in events:
            start = event['start'].get('dateTime', event['start'].get('date'))
            if start == "SPECIFY HERE THE DATE YOU ARE LOOKING FOR":
                found = True
                print('Event has been found.')
                break
        if found != True:
            print('Event does not exist yet.')

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