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Editor to share with you how python to achieve set element existence testing, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Testing the existence of set elements

Sometimes, before operating on a collection or match, you need to test whether an element exists in the collection. The usual method is to use the keyword in.

> a = ('one',' two','three', 'four',' five') > if 'one' in a:. Print ('The tuple contains one.')... The tuple contains one. > b = {0: 'zero', 1:' one', 2: 'two', 3:' three'} > if 2 in b.keys ():. Print ('The dict has the key of2.')... The dict has the key of 2. These are all the contents of the article "how to test the existence of set elements in python". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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