Get The Most Affordable Hosting in the World!
Starting at just $1.87/month, Vercaa offers unbeatable pricing for world-class web hosting services.
Fast, reliable, and secure hosting to power your website without breaking the bank. Plus, enjoy a free CDN for faster loading times worldwide!
Get Started Now!The membership operators in Python help us determine whether an item is present in a given container type object, or in other words, whether an item is a member of the given container type object.
Python has two membership operators: "in" and "not in". Both return a Boolean result. The result of "in" operator is opposite to that of "not in" operator.
You can use in operator to check whether a substring is present in a bigger string, any item is present in a list or tuple, or a sub-list or sub-tuple is included in a list or tuple.
In the following example, different substrings are checked whether they belong to the string var="TutorialsPoint". Python differentiates characters on the basis of their Unicode value. Hence "To" is not the same as "to". Also note that if the "in" operator returns True, the "not in" operator evaluates to False.
It will produce the following output −
P in TutorialsPoint : True tor not in TutorialsPoint : False in in TutorialsPoint : True To not in TutorialsPoint : True
You can use the "in/not in" operator to check the membership of an item in the list or tuple.
It will produce the following output −
20 in [10, 20, 30, 40] : True 10 not in [10, 20, 30, 40] : False 10 in [10, 20, 30, 40] : True 10.0 not in [10, 20, 30, 40] : False
In the last case, "d" is a float but still it compares to True with 10 (an int) in the list. Even if a number expressed in other formats like binary, octal or hexadecimal are given the membership operators tell if it is inside the sequence.
However, if you try to check if two successive numbers are present in a list or tuple, the in operator returns False. If the list/tuple contains the successive numbers as a sequence itself, then it returns True.
It will produce the following output −
(10, 20) in (10, 20, 30, 40) : False (10, 20) in ((10, 20), 30, 40) : True
Python’s membership operators also work well with the set objects.
It will produce the following output −
20 in {40, 10, 20, 30} : True
(10, 20) in {40, 30, (10, 20)} : True
Use of in as well as not in operators with dictionary object is allowed. However, Python checks the membership only with the collection of keys and not values.
It will produce the following output −
2 in {1: 10, 2: 20, 3: 30} : True
20 in {1: 10, 2: 20, 3: 30} : False
The End! should you have any inquiries, we encourage you to reach out to the Vercaa Support Center without hesitation.
