Iterate set in python
A set is an unordered collection of unique elements, and you can iterate over it in several ways:
1. Using a for loop
This is the most straightforward way to loop through all elements in a set.
Iterating set using for loop in python
# Create a set
my_set = {1, 2, 3, 4, 5}
print("Original Set:", my_set)
# Loop through the set
for item in my_set:
print(item)
Output
Original Set: {1, 2, 3, 4, 5}
1
2
3
4
5
2. Using a for loop with the enumerate() function
If you want to get both the index and the value of each element in the set, you can use the enumerate() function. However, keep in mind that sets are unordered, so the index doesn’t have a meaningful order.
Looping set using enumerate() function in python
# Create a set
my_set = {1, 2, 3, 4, 5}
print("Original Set:", my_set)
# Loop through the set with index
for i, item in enumerate(my_set):
print(f"Element {i} is {item}")
Output
Original Set: {1, 2, 3, 4, 5}
Element 0 is 1
Element 1 is 2
Element 2 is 3
Element 3 is 4
Element 4 is 5
3. Using set comprehension
Set comprehension is a concise way to create a new set by iterating over an existing set and applying a condition.
Loop or iterate set using set comprehension python
# Create a set
my_set = {1, 2, 3, 4, 5}
print("Original Set:", my_set)
# Create a new set with only the even numbers
even_set = {item for item in my_set if item % 2 == 0}
print("Even Numbers Set:", even_set)
Output
Original Set: {1, 2, 3, 4, 5}
Even Numbers Set: {2, 4}
Remember, because sets are unordered, you can’t make assumptions about the order in which you visit the elements of the set. The order may differ on multiple executions of the same loop.
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