The date addition and subtraction computing guide in the Arrow class library

The ARROW class library is a Python date -time operating library, which provides a wealth of date and subtraction operations.How to add and subtract computing on the date in the ARROW class library?Let's introduce it in detail. First, we need to install the ARROW class library.You can use the PIP command for installation: `PIP Install Arrow` Next, we need to import the ARROW class library: python import arrow Let's take a look at the specific operation of the date addition and subtraction operations.There is a `shift` method in the Arrow class library that can achieve the date and subtraction of the date.This method can accept a dictionary as a parameter, and the dictionary specifies the time unit and the corresponding value to be added or subtracted in the dictionary.For example, we can operate like this: python # Get the current date time now = arrow.now() # Plus one day next_day = now.shift(days=1) # Take off for a month last_month = now.shift(months=-1) In the above example, we first use the `Arrow.now () method to get the current date.Then use the `shift` method to add one day and reduce one month.It can be seen that by passing different parameters, we can achieve flexible date addition and subtraction operations. In addition to using the `shift` method, the ARROW class library also provides other methods to implement the date and subtraction operations, such as the` Replace` method, the `CEIL` method, etc.In actual use, you can choose the appropriate method according to specific needs. In short, the ARROW class library provides us with a convenient and flexible date addition and subtraction function, which can help us easily handle the operation requirements of various date and time.I hope this article will help you!