Python Access Set Items

In Python, sets are unordered collections of unique elements, which means you cannot access items by index like lists or tuples. Instead, to access set items, you typically use loops to iterate through all elements or check for membership using in keyword.

Python में sets unordered unique elements का collection होता है, इसलिए आप list या tuple की तरह index से items access नहीं कर सकते। set के items को access करने के लिए आप आमतौर पर loops से iterate करते हैं या in keyword से membership चेक करते हैं।

How to Access Set Items?

Use a for loop to iterate over all set elements.
Use the in operator to check if an element is in the set.
Convert the set to a list or tuple to access by index (if order matters temporarily).

Example 1: Iterate Through Set Using for Loop

myset = {10, 20, 30, 40}
for item in myset:
    print(item)

Print all items in the set using for loop.

Output:

10
20
30
40

Example 2: Check if Item Exists Using 'in'

myset = {'apple', 'banana', 'cherry'}
print('banana' in myset)
print('grape' in myset)

Check if 'banana' and 'grape' are in the set.

Output:

True
False

Example 3: Convert Set to List to Access by Index

myset = {1, 2, 3, 4}
mylist = list(myset)
print(mylist[0])

Convert set to list to access first item by index 0 (order not guaranteed).

Output:

Example 4: Use 'not in' to Check Non-membership

myset = {100, 200, 300}
print(400 not in myset)
print(200 not in myset)

Check if 400 is not in the set (True) and 200 is not in the set (False).

Output:

True
False

Example 5: Loop Through Set and Add 5 to Each Element

myset = {1, 2, 3}
for item in myset:
    print(item + 5)

Iterate through set and print each item plus 5.

Output:

6
7
8

Example 6: Using set comprehension to filter items

myset = {10, 15, 20, 25, 30}
newset = {x for x in myset if x > 15}
print(newset)

Create a new set with elements greater than 15.

Output:

{20, 25, 30}

Example 7: Using next() with iter() to access one item

myset = {5, 10, 15}
item = next(iter(myset))
print(item)

Get one item from set using iterator (order not guaranteed).

Output:

Example 8: Check if Set is Empty

myset = set()
if not myset:
    print('Set is empty')

Check if set has no items.

Output:

Set is empty

Example 9: Using for loop with break to find item

myset = {2, 4, 6, 8}
for item in myset:
    if item == 6:
        print('Found 6')
        break

Loop through set and stop when item 6 is found.

Output:

Found 6

Example 10: Accessing elements after sorting set (converted to list)

myset = {3, 1, 4, 2}
sorted_list = sorted(myset)
print(sorted_list[0])

Sort set, convert to list, and access first element.

Output:

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