A set in Python is not a sequence, nor is it a mapping type class. Hence, the objects in a set cannot be traversed with index or key. However, you can traverse each item in a set using a for loop.
Example 1
The following example shows how you can traverse through a set using a for loop −
langs = {"C", "C++", "Java", "Python"} for lang in langs: print (lang)
It will produce the following output −
C Python C++ Java
Example 2
The following example shows how you can run a for loop over the elements of one set, and use the add() method of set class to add in another set.
s1={1,2,3,4,5} s2={4,5,6,7,8} for x in s2: s1.add(x) print (s1)
It will produce the following output −
{1, 2, 3, 4, 5, 6, 7, 8}
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