Calendar module of Python time series

Hello everyone , In the previous article, I introduced in detail time and datetime Use of modules . These two modules are more used to deal with time and date related problems .

This article introduces the third module calendar, Is mainly used to solve The calendar Problems in .

Chinese official website address ：https://docs.python.org/zh-cn/3/library/calendar.html

calendar modular

This module defines many types , It mainly includes ：Calendar、TextCalendar、HTMLCalendar, among Calendar yes TextCalendar and HTMLCalendar Base class of , These classes have very rich calendar processing methods .

meanwhile ISO 8601 The standard also stipulates 0 and Negative year .0 Year refers to... BC 1 year , -1 Year refers to... BC 2 year , And so on . Import before use ：

import calendar

First we can look at 2021 The full calendar for the year ：

Set the first day of the week -setfirstweekday

By default ：0 For Monday ,6 Sunday . We can go through setfirstweekday() To set the first day of the week as Sunday (6) Or any other day

1、 By default ： Monday is the first day

2、 Set any day

In the following example, we set Saturday as the first day

Leap year or not -isleap

Check whether a year is a leap year . Yes, go back to True, Otherwise return to False

Number of leap years between years -leapdays(y1, y2)

See how many leap years there are between two years . For example, in the second example , from 2000 To begin to 2021 In a total of 6 Leap years

What day -weekday(year, month, day)

Check a specific date is the day of the week . For example, in the second example ,11 month 1 It's Monday , use 0 Express

• 0： week 1

• 1： week 2

• 2： week 3

monthrange(year, month)

Return to the designated year 、 month What day is the first day And the number of days this month , Specific examples are as follows ：

10 The first day of the month is Friday ,11 The first day of the month is Monday （0 On behalf of the Monday ）

Through the perpetual calendar to verify ：11.1 It happened to be Monday

Calendar matrix of months -monthcalendar(year, month)

Returns the calendar matrix of a month ：

• Each line represents 1 A few weeks

• The default is from Monday , such as 11 In the 1 It happens to be Monday

• Days outside this month are represented by zero

The calendar of the month -prmonth(year, month, w, l)

Returns the calendar of a month , The daily width interval is w character ,l Is the number of lines per week

The following is the default ：

You can change the parameters w and l： This is equivalent to a control column width , A control row height

The calendar of the year -calendar.calendar(year)

All use default parameters , View the full calendar of a year ：

Format output calendar

The default parameter form is used in the calendar results of the above output years . actually calendar Method has multiple parameters ：

• w： Width of each cell , The default is 2

• l： Number of line breaks per column , The default is 1

• c： The width of the interval between months , The default is 6

• m： Divide the month into m Columns

The effect displayed after changing multiple parameters ：

Technical communication

Welcome to reprint 、 Collection 、 Gain some praise and support ！

At present, a technical exchange group has been opened , Group friends have exceeded 2000 people , The best way to add notes is ： source + Interest direction , Easy to find like-minded friends

• The way ①、 Send the following picture to wechat , Long press recognition , The background to reply ： Add group ;
• The way ②、 Add microsignals ：dkl88191, remarks ： come from CSDN
• The way ③、 WeChat search official account ：Python Learning and data mining , The background to reply ： Add group