問題描述

我目前正在嘗試通過將日期轉換為時間戳來在數據集中生成數字特征.如果在 Mac 上運行，它可以完美運行，在 Windows 上它會拋出:

I am currently trying to generate numerical features in a dataset by converting the dates to timestamps. If run on Mac, it works flawlessly, on Windows it throws an:

OS Error: [Errno 22] Invalid argument

這可能是由于 Windows 不支持 unix 時間戳1970-01-01 之前.我的日期從 1955 年開始.這是我的代碼:

which is probably due to Windows not supporting unix timestamps from before 1970-01-01. I have dates from 1955 upwards. Here is my code:

import time
import datetime

current_timestamp = time.time()
df.loc[:, "FEATURE_num"] = df["FEATURE"].apply(lambda d: datetime.datetime.strptime(d, '%Y-%m-%d').timestamp() if isinstance(d, str) else current_timestamp)

我在某處看到有人建議使用 datetime.timedelta()，但我不知道如何集成它.

I somewhere saw suggested to maybe use datetime.timedelta(), but I couldn't figure out how to integrate it.

推薦答案

你可以通過(隱式)使用 datetime.timedelta 計算一個公歷"時間戳適用于從 1582 年 10 月 15 日到現在(或您想使用的其他紀元")的日期.

You could do it by (implicitly) using datetime.timedelta to calculate a "Gregorian" timestamp that would be valid for dates from 1582-Oct-15 to the present (or some other "epoch" you would like to use).

正如函數的文檔字符串所示，默認情況下，日期字符串將使用 '%Y-%m-%d' strptime-like 格式字符串參數，但可以覆蓋.

As the function's docstring indicates, date strings will, by default, be parsed using a '%Y-%m-%d' strptime-like format string parameter, but that can be overridden.

from datetime import datetime


GREGORIAN_EPOCH = datetime.strptime('1582-10-15', '%Y-%m-%d')


def gregorian_timestamp(date, format='%Y-%m-%d'):
    """ Calculate timestamp using start of Gregorian calender as epoch.

        The date parameter can be either a string or a datetime.datetime
        object. Strings will be parsed using the '%Y-%m-%d' format by default
        unless a different one is specfied via the optional format parameter.
    """
    try:
        date = datetime.strptime(date, format)
    except TypeError:
        pass
    return (date - GREGORIAN_EPOCH).total_seconds()  # The timedelta in seconds.


if __name__ == '__main__':

    current_date = datetime.now()
    timestamp = gregorian_timestamp(current_date)
    print('gregorian timestamp:', timestamp)  # -> gregorian timestamp: 13768250461.136208

    timestamp = gregorian_timestamp('1970-01-01')
    print('gregorian timestamp:', timestamp)  # -> gregorian timestamp: 12219292800.0

    timestamp = gregorian_timestamp('1955-02-28')
    print('gregorian timestamp:', timestamp)  # -> gregorian timestamp: 11750918400.0

    timestamp = gregorian_timestamp('1582-10-15')
    print('gregorian timestamp:', timestamp)  # -> gregorian timestamp: 0.0

這篇關于對于 1970-01-01 之前的日期，Windows 上 datetime timestamp() 的解決方法的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！