Python datetime manipulation

environment

• python 3.8

• pendulum 2.1.2

foreword

pendulumIt is an open source library for manipulating date and time, which datetimeis . In fact, pendulumit is based on datetimethe standard library.

Install

pipInstall using the command

pip install -U pendulum

example

Let's take a look at the general usage pendulumof

import pendulum

now = pendulum.now("Asia/Shanghai")

# 获取年、月、日、时、分、秒等信息
now.year
now.month
now.day
now.hour
now.minute
now.second
now.day_of_week
now.day_of_year
now.week_of_month
now.week_of_year
now.days_in_month

# 转换成常见的 datetime 格式
now.to_iso8601_string()

# 转换成时间戳
now.timestamp()

# 还有区分 float、int 型的时间戳
now.float_timestamp()
now.int_timestamp()

# 转换成其它的时区
now.in_timezone("America/Toronto")

# 日期时间字符的格式化
now.to_date_string()
now.to_formatted_date_string()
now.to_time_string()
now.to_datetime_string()
now.to_day_datetime_string()

# 在原来日期上加1年2月3天4小时
now.add(years=1, months=2, days=3, hours=4)

# 对应于 add,还有 subtract 方法, 如回到去年的现在
now.subtract(years=1)

# 构造实例并格式化
dt = pendulum.datetime(2022, 8, 22, 14, 15, 16)
dt.format('YYYY-MM-DD HH:mm:ss')

# 比较差异，这里有个早晚的问题，diff 方法的第二个参数可以指定返回值是正数还是负数，默认是 True
dt_ottawa = pendulum.datetime(2000, 1, 1, tz='America/Toronto')
dt_vancouver = pendulum.datetime(2000, 1, 1, tz='America/Vancouver')
dt_ottawa.diff(dt_vancouver).in_hours()
dt_ottawa.diff(dt_vancouver, False).in_hours()

Advantage

pendulumInherited from datetime, compared to datetime, pendulumis APIcleaner , easier to use, and many classes and specific implementations have been improved. In the previously written code, you can directly pendulumuse DateTime the instance in to replace datetimethe instance .

For more details, please refer to the official documentation https://pendulum.eustace.io/docs/

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