如何将 datetime 对象转换为 time_ns

发布于 2025-01-10 22:50:46 字数 348 浏览 2 评论 0原文

我有以下问题我需要将一些日期时间对象转换为 time_ns （存在于时间中）

我能找到的就是将现在的日期时间转换为固定的纳秒数（我知道它是根据 1970 年的固定日期计算的）

import time
now = time.time_ns()

我所有想要的是将一些正常的日期时间对象转换为固定的纳秒数，

from datetime import datetime
x = datetime(2022, 2, 22, 15, 41, 50)

我不想仅限于现在的日期。库中有一些函数可以做到这一点吗？目前我找不到任何东西，

非常感谢

原文

I have the following problem I need to convert some datetime object to time_ns (present in time)

all I can find is to convert the now datetime to that fixed nanoseconds number (i understand that it is calculated from a fixed date in 1970)

import time
now = time.time_ns()

all I want is to convert some normal datetime object to that fixed nanoseconds number

from datetime import datetime
x = datetime(2022, 2, 22, 15, 41, 50)

i don't want to be restricted to only now dates. is there some function in the library that does that? for the moment i cannot find anything

thank you very much

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独夜无伴 2025-01-17 22:50:46

从python 3.3开始，datetime有了时间戳函数。确保替换时区，否则将采用本地时区，如果您想要纳秒数，可以乘以秒数。

from datetime import datetime, timezone

print(datetime(2022, 2, 22, 15, 41, 50).replace(tzinfo=timezone.utc).timestamp() * 10**9)

Since python 3.3 datetime has a timestamp function. Make sure to replace the timezone, otherwise local timezone will being taken and if you want to have nanosecond number you can multiply the seconds number.

from datetime import datetime, timezone

print(datetime(2022, 2, 22, 15, 41, 50).replace(tzinfo=timezone.utc).timestamp() * 10**9)

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北恋 2025-01-17 22:50:46

请注意，如果您只是尝试将 time.time() 或 time.time_ns() 转换为日期和时间，请使用 time.localtime( ) 或 time.gmtime()。

请参阅此处每个函数的各种参考文档说明： https:// /docs.python.org/3/library/time.html#time.time：

示例：

>>> import time
>>> time.time_ns()
1691443244384978570
>>> time.localtime(time.time_ns()/1e9)
time.struct_time(tm_year=2023, tm_mon=8, tm_mday=7, tm_hour=14, tm_min=20, tm_sec=57, tm_wday=0, tm_yday=219, tm_isdst=0)
>>> time.time_ns()/1e9
1691443263.0889063
>>> time.localtime(time.time())
time.struct_time(tm_year=2023, tm_mon=8, tm_mday=7, tm_hour=14, tm_min=23, tm_sec=22, tm_wday=0, tm_yday=219, tm_isdst=0)

这都是我在这里的更大答案：Python 中的高精度时钟

Note that if you're just trying to convert time.time() or time.time_ns() into a date and time instead, use time.localtime() or time.gmtime().

See the various reference documentation descriptions for each of those functions here: https://docs.python.org/3/library/time.html#time.time:

Examples:

>>> import time
>>> time.time_ns()
1691443244384978570
>>> time.localtime(time.time_ns()/1e9)
time.struct_time(tm_year=2023, tm_mon=8, tm_mday=7, tm_hour=14, tm_min=20, tm_sec=57, tm_wday=0, tm_yday=219, tm_isdst=0)
>>> time.time_ns()/1e9
1691443263.0889063
>>> time.localtime(time.time())
time.struct_time(tm_year=2023, tm_mon=8, tm_mday=7, tm_hour=14, tm_min=23, tm_sec=22, tm_wday=0, tm_yday=219, tm_isdst=0)

That's all from my bigger answer here: High-precision clock in Python

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