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This article is about how python implements deferred calls like defer. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Implement deferred calls similar to defer

There is a mechanism for delaying calls in Golang with the keyword defer, such as the following example

Import "fmt" func myfunc () {fmt.Println ("B")} func main () {defer myfunc () fmt.Println ("A")}

The output is as follows, and the call to myfunc is completed one step before the function returns, even if you write the call to myfunc on the first line of the function, which is the deferred call.

A B

So is there such a mechanism in Python?

Of course there are, but it's not as simple as Golang.

You can use the context manager to achieve this effect in Python

Import contextlib def callback (): print ('B') with contextlib.ExitStack () as stack: stack.callback (callback) print ('A')

The output is as follows

A B Thank you for your reading! This is the end of this article on "how to achieve delayed calls similar to defer in python". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it out for more people to see!

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