from datetime import datetime
<h1>获取当前完整时间</h1><p>now = datetime.now()
print(now)  # 输出：2025-04-05 14:30:25.123456</p><h1>只获取当前日期</h1><p>today = datetime.today()
print(today.date())  # 输出：2025-04-05</p>

from datetime import datetime
<h1>将datetime转为字符串</h1><p>now = datetime.now()
formatted = now.strftime("%Y年%m月%d日 %H:%M")
print(formatted)  # 输出：2025年04月05日 14:30</p><h1>将字符串转为datetime对象</h1><p>date_str = "2025-03-20 09:15"
parsed = datetime.strptime(date_str, "%Y-%m-%d %H:%M")
print(parsed)  # 输出：2025-03-20 09:15:00</p>

from datetime import datetime, timedelta
<h1>当前时间</h1><p>now = datetime.now()</p><h1>3天后的时间</h1><p>future = now + timedelta(days=3)
print(future)</p><h1>1小时前的时间</h1><p>past = now - timedelta(hours=1)
print(past)</p><h1>计算两个时间的差</h1><p>start = datetime(2025, 3, 1)
end = datetime(2025, 3, 10)
diff = end - start
print(diff.days)  # 输出：9</p>

from datetime import datetime
from zoneinfo import ZoneInfo
<h1>设置不同时区的时间</h1><p>beijing_time = datetime.now(ZoneInfo("Asia/Shanghai"))
newyork_time = datetime.now(ZoneInfo("America/New_York"))</p><p>print("北京：", beijing_time)
print("纽约：", newyork_time)</p>