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This article will explain in detail how python uses with-as grammatical structure. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

With-as

The word with is not difficult to translate in English, but I can't figure out how to translate it in Python grammar. It's basically a context management protocol. As a beginner, you don't need to pay attention to the various methods and mechanisms of with, you just need to understand its application scenario. The with statement is suitable for some tasks that need to be prepared in advance and need to be handled afterwards, such as file operations, which need to open the file first and close the file after the operation is completed. If you do not use with, the file operation usually looks like this:

Fp = open (r "D:\ CSDN\ Column\ temp\ mpmap.py",'r') try: contents = fp.readlines () finally: fp.close ()

If you use with-as, it's much more elegant:

> with open (r "D:\ CSDN\ Column\ temp\ mpmap.py",'r') as fp:contents = fp.readlines () this is the end of the article on "how python uses with-as grammatical structure". I hope the above content can be helpful to you so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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