如何将 NumPy datetime64 转换为 Timestamp？
原文:https://www . geesforgeks . org/how-convert-numpy-datetime 64-to-timestamp/
在本文中，我们将讨论如何将 NumPy datetime64 转换为 Timestamp。为了更好地理解，首先让我们看下面的例子:
If the current datetime64 is as follows: 2020-08-18 09:31:51.944622
then,
the required timestamp in seconds will be: 1597743111.944622
the required timestamp in minutes will be: 26629051.8657437
the required timestamp in an hour will be: 443817.53109572834
进场:
- 取日期通过np.datetime64()。
- 从默认系统日期 1970-01-01T00:00:00Z 中减去该日期。
- 借助 np.timedelta64() 将日期转换为秒、分、小时。
例 1:
Python 3
# importing required library
import numpy as np
from datetime import datetime
# extracting current date
# in utc format
date = datetime.utcnow()
print("Printing the Current date:",
date)
# converting the current date
# in datetime64 format
date64 = np.datetime64(date)
# converting date time into second timestamp
ts = (date64 - np.datetime64('1970-01-01T00:00:00Z')) / np.timedelta64(1, 's')
print("Printing the converted datetime in Timestamp in seconds:",
ts)
# converting date time into minute timestamp
tm = (date64 - np.datetime64('1970-01-01T00:00:00Z')) / np.timedelta64(1, 'm')
print("Printing the converted datetime in Timestamp in minutes:",
ts)
# converting date time into hour timestamp
th = (date64 - np.datetime64('1970-01-01T00:00:00Z')) / np.timedelta64(1, 'h')
print("Printing the converted datetime in Timestamp in hour:",
th)
输出:
打印当前日期:2020-08-26 10:07:54.820878 以秒为单位打印转换后的日期时间以时间戳为单位:1598436474.820878 以分钟为单位打印转换后的日期时间以时间戳为单位:1598436474.820878 以小时为单位打印转换后的日期时间以时间戳为单位:44401.0000800088
示例 2: 转换 2020 年 8 月 15 日的秒、分、小时时间戳:
Python 3
#importing required library
import numpy as np
from datetime import datetime
print("Printing the date:")
# extracting current date in utc format
dt64 = np.datetime64('2020-08-15');
print(dt64)
# converting date time into second timestamp
ts = (dt64 - np.datetime64('1970-01-01T00:00:00Z')) / np.timedelta64(1, 's')
print("Printing the converted datetime in Timestamp in seconds:",
ts)
print("Printing the converted datetime in Timestamp in minutes")
# converting date time into minute timestamp
tm = (dt64 - np.datetime64('1970-01-01T00:00:00Z')) / np.timedelta64(1, 'm')
print(tm)
print("Printing the converted datetime in Timestamp in hour")
# converting date time into hour timestamp
th = (dt64 - np.datetime64('1970-01-01T00:00:00Z')) / np.timedelta64(1, 'h')
print(th)
输出:
打印日期: 2020-08-15 以秒为单位打印转换后的时间戳日期时间: 1597449600.0 以分钟为单位打印转换后的时间戳日期时间 26624160.0 以小时为单位打印转换后的时间戳日期时间 443736.0
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