如何将'MM/DD/YYY HH:MM:SS AM/PM‘字符串转换为时间戳？

import time
from datetime import datetime

def convert_to_timestamp(date_string):
    # 提取日期和时间
    date, time, am_pm = date_string.split(' ')
    
    # 提取年、月、日
    month, day, year = map(int, date.split('/'))
    
    # 提取小时、分钟、秒
    hour, minute, second = map(int, time.split(':'))
    
    # 转换为24小时制
    if am_pm == 'PM':
        hour += 12
    
    # 构建日期时间对象
    dt = datetime(year, month, day, hour, minute, second)
    
    # 转换为时间戳
    timestamp = int(dt.timestamp())
    
    return timestamp

# 测试示例
date_string = '03/15/2022 08:30:00 AM'
timestamp = convert_to_timestamp(date_string)
print(timestamp)