Add sets_python.py

Author: amratadev

sets_python.py

@@ -0,0 +1,50 @@
+set1 = {10, 56, 89, 90, 'Jenny', True}
+print(set1)  # ✅ Set items are unordered (no fixed sequence)
+
+set2 = {10, 56, 89, 90, 'Jenny', True, 10, 1}
+print(set2)  # ✅ Duplicates are not allowed in set
+
+# print(set2[1])  # ❌ Indexing & slicing not allowed because sets are unordered
+
+print(type(set2))  # ✅ <class 'set'>
+
+set3 = {}
+print(type(set3))  # ✅ Empty {} creates dict, not set
+
+# To create empty set
+set4 = set()
+print(type(set4))  # ✅ <class 'set'>
+
+# set1[2] = 99
+# print(set1)  # ❌ Cannot replace set item (immutable positions, no indexing)
+
+set1.add(25)  # ✅ add() method adds only one item at a time (position not guaranteed)
+print(set1)
+
+print(len(set1))  # ✅ Shows number of elements in set
+
+set1.remove(10)  # ✅ remove() deletes element; if not present → KeyError
+# set1.remove(28)  # ❌ KeyError because 28 not present
+print(set1)
+
+"""
+✅ remove() → error if element not present
+✅ discard() → no error if element not present, silently ignores
+"""
+set1.discard(28)
+print(set1)
+
+print(set1.pop())  # ✅ pop() removes and returns a random element
+print(set1)
+
+set1.clear()
+print(set1)  # ✅ clear() removes all items from set
+
+# set1.pop()
+# print(set1)  # ❌ KeyError because no item left to pop
+
+set1.add((20, 30, 40))
+print(set1)  # ✅ Tuples are immutable, so can be added to set
+
+# set1.add([25, 35, 41])  # ❌ Lists are mutable, cannot be added to set
+# print(set1)