What are the options for calendar and date libraries in Python?

There are many excellent calendar libraries and date libraries in Python for us to use. These libraries can help us handle date and calendar related operations. Next, I will introduce you to several common choices and provide corresponding code examples.

1. datetime library:
   datetime is Python’s built-in date and time processing module. It provides many date and time related classes and methods, which can be used to process dates, times, time differences and other operations.
   Sample code:

import datetime

# 获取当前日期和时间
now = datetime.datetime.now()
print("当前日期和时间：", now)

# 获取当前日期
date = datetime.date.today()
print("当前日期：", date)

# 格式化日期
formatted_date = now.strftime("%Y-%m-%d %H:%M:%S")
print("格式化后的日期：", formatted_date)

# 计算日期差
date1 = datetime.date(2021, 1, 1)
date2 = datetime.date(2021, 12, 31)
delta = date2 - date1
print("日期差：", delta.days)

2. calendar library:
   The calendar library is a built-in calendar module in Python that can generate calendars and related date operations.
   Sample code:

import calendar

# 打印某年的日历
year = 2022
print(calendar.calendar(year))

# 打印某月的日历
year = 2022
month = 1
print(calendar.month(year, month))

# 判断是否是闰年
year = 2022
is_leap = calendar.isleap(year)
if is_leap:
    print(year, "是闰年")
else:
    print(year, "不是闰年")

# 计算某个月的第一天是星期几
year = 2022
month = 1
_, first_day = calendar.monthrange(year, month)
print("第一天是星期：", first_day)

3. arrow library:
   arrow is a powerful third-party date and time processing library that can provide a more concise and intuitive operation method.
   Sample code:

import arrow

# 获取当前时间
now = arrow.now()
print("当前时间：", now)

# 获取当前日期
date = arrow.now().date()
print("当前日期：", date)

# 格式化日期
formatted_date = now.format('YYYY-MM-DD HH:mm:ss')
print("格式化后的日期：", formatted_date)

# 计算日期差
date1 = arrow.get('2021-01-01')
date2 = arrow.get('2021-12-31')
delta = (date2 - date1).days
print("日期差：", delta)

The above are several commonly used Python calendar libraries and date libraries. According to different needs, we can choose a suitable library to handle date and calendar related operations. I hope the above content is helpful to everyone!

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