To answer the question in the title: Use len() to get the size of a set.
Semantically that is a bit weird, as a set is an unordered collection, and the length analogy kind of breaks down (we are actually measuring cardinality), but in the spirit of Python using len to get the size of all kinds of collections is easy to remember and it is quite obvious what the statement means.
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Python Get the Length of a Set
Python Examples Python Compiler ... Python Interview Q&A Python Training ... To determine how many items a set has, use the len() method....
GeeksforGeeks
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Find the length of a set in Python - GeeksforGeeks
We are given a set and our task is to find its length. For example, if we have a = {1, 2, 3, 4, 5}, the length of the set should be 5. len() function in Python returns the number of elements in a set.
Published: July 12, 2025
how to find the size of set in python? - Stack Overflow
Python's set class represents the mathematical notatation of a set. The size of a set means the amount of memory(in bytes) occupied by a set object. ... Save this answer. ... Show activity on this post. To answer the question in the title: Use len() to get the size of a set. Semantically that is a bit weird, as a set is an unordered collection, and the length ... More on stackoverflow.com
Lookup time in a list vs. set
A quick tip when you perform a lot of membership testing operations (if element in collection_of_elements) - if you use a set instead of a list, it's going to be much faster. But converting a list to a set has some downsides - it takes time, and you might lose the initial ordering. Full article with benchmarks and more details can be found here: https://switowski.com/blog/membership-testing More on reddit.com
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October 12, 2020How to create a fixed-length list that accepts its size when declared?
You might be able to do something with annotated types , but I'm not sure. More on reddit.com
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November 15, 2022how do you guys feel about PEP 0008's recommended line length of 79 characters or less?
It's a "recommendation", and I use 120 in my open-source projects. I try not to exceed 79, and often, I am successful with that (Let's say 99.5% of my lines are 79 chars max.); on the other hand, I don't mind it if the line's a bit longer.
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January 25, 201604:10
Python program to Find length of a Set - GeeksforGeeks | Videos
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length of set python - YouTube
Educative
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How to get the length of a set in Python
A set is written with braces ({}). ... In the code above, the variable myset represents the set, while "USA", "CANADA", and "BRAZIL" are the elements of the set. To determine the length of a set in Python, we use the len() function.
w3resource
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Python: Find the length of a set - w3resource
July 5, 2025 - print("\nLength of the said set:") # Use the 'len()' function to find and print the length (number of elements) of 'setn'. print(len(setn)) # Create a set 'setn' with repeated elements, all 5. setn = {5, 5, 5, 5, 5, 5} # Print a message to indicate ...
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Find the Length of the Set in Python - Spark By {Examples}
May 31, 2024 - The len() function in Python is used to get the length of the Set. Actually, length gets you the number of elements in the sequence/iterable which
Appdividend
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How to Get the Length of a Set in Python
July 10, 2025 - # Define a set of tuples main_set = {(11, 21), (21, 19), (21, 19)} # Get the length of the set print(len(main_set)) # 2 · If you have a large string and you want to find unique words in that sentence, you can use the len(set). But how, let’s find out. text = "What is Python?
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Length of a set in Python
The length of a set can be found using the function len: st = {'a', 'b', 'c', 'd'} print(len(st)) # 4 · Given a set: st = {'x', 1, 'y', 2, 'z', 3, 'w'} Find out the number of elements in it. Given a set: st = {1, 2, 3, 4, 2, 1} Find out the number of elements in it.
Tutorial Gateway
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Python Program to Find Set Length
April 22, 2026 - We can use a for loop to iterate over each nested tuple inside a set and apply the len() function to nested items to get the total number of set elements. Here, the Python for loop iterates over the set elements.
Python Examples
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Python - Set Length
To get the length of a given Set in Python, you can use len() built-in function. Call len(), and pass the given set as argument. The len() function returns an integer representing the number of items in the Set.
GeeksforGeeks
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Find the size of a Set in Python - GeeksforGeeks
September 10, 2025 - The getsizeof() function from Python’s sys module returns the memory used by an object, including garbage collection overhead. It has been implemented in the below example. Example: We import sys module, create three different sets and then pass each set into sys.getsizeof() to check its memory usage. ... import sys # sample Sets Set1 = {"A", 1, "B", 2, "C", 3} Set2 = {"Geek1", "Raju", "Geek2", "Nikhil", "Geek3", "Deepanshu"} Set3 = {(1, "Lion"), (2, "Tiger"), (3, "Fox")} # print the sizes of sample Sets print("Size of Set1:", sys.getsizeof(Set1), "bytes") print("Size of Set2:", sys.getsizeof(Set2), "bytes") print("Size of Set3:", sys.getsizeof(Set3), "bytes")
YouTube
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Get the Length of a Set in Python | len() method | Python Tutorial for Beginners | Amit Thinks - YouTube
In this video, learn how to get the length of a set in Python. A Set is a collection in Python. Set items i.e. elements are placed inside curly braces {}.Pyt...
Published: August 13, 2022
Tutorial Gateway
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Python set len
August 10, 2026 - The Python set len finds the length of a set (the total number of items). This article shows How to use the len set function with an example.
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How do you find the length of a set in Python? - Sarthaks eConnect | Largest Online Education Community
March 23, 2023 - LIVE Course for free · To find the length of a set in Python, you can use the built-in len() function
CodeRivers
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Understanding the Length of Sets in Python - CodeRivers
February 22, 2026 - It does not allow duplicate values, and the elements are unordered. The length of a set refers to the number of unique elements it contains. This is different from other data structures like lists or tuples, where duplicates are allowed, and the order of elements matters.
Upgrad
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Set in Python: An In-Depth Guide
August 11, 2026 - In Python, you can find a set's length (number of elements) with the 'len()' function.
W3Schools
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Python Sets
Python Examples Python Compiler Python Exercises Python Quiz Python Challenges Python Practice Problems Python Server Python Syllabus Python Study Plan Python Interview Q&A Python Training ... Sets are used to store multiple items in a single variable. Set is one of 4 built-in data types in Python used to store collections of data, the other 3 are List, Tuple, and Dictionary, all with different qualities and usage.
Codingal
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Sets in Python | Codingal
February 3, 2025 - Initial set: {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12} ... When you apply a function to a Python set, it executes operations on the set and returns a value. ... The length of a set is returned by the len() method.
Sarthaks eConnect
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How to find the length of a set in Python? - Sarthaks eConnect | Largest Online Education Community
March 22, 2023 - LIVE Course for free · You can find the length of a set in Python using the len() function. The len() function returns the number of elements in the set
PyTutorial
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PyTutorial | Python Set Size: Find Length with len()
March 19, 2026 - They are perfect for membership tests and removing duplicates. Learn more about their core purpose in our Python Set Function Guide. Use the built-in len() function. It returns the number of items in any iterable, including sets.