Python Sets

Python_Sets.py

>>> A = {1, 2, 5, 4, 7, 9, 2}
>>> A
{1, 2, 4, 5, 7, 9}
>>> len(A)
6
>>> A.add(10)
>>> A
{1, 2, 4, 5, 7, 9, 10}
>>> A.add(10)
>>> A
{1, 2, 4, 5, 7, 9, 10}
>>> A.update([15, 18, 17, 14])
>>> A
{1, 2, 4, 5, 7, 9, 10, 14, 15, 17, 18}
>>> A.remove(18)
>>> A
{1, 2, 4, 5, 7, 9, 10, 14, 15, 17}
>>> A.discard(17)
>>> A
{1, 2, 4, 5, 7, 9, 10, 14, 15}
>>> A.remove(100)
Traceback (most recent call last):
  File "<input>", line 1, in <module>
KeyError: 100
>>> A.discard(100)
>>> A.pop()
1
>>> name = {'max', 'tom', 'Den'}
>>> name.clear()
>>> name
set()
>>> del name
>>> name
Traceback (most recent call last):
  File "<input>", line 1, in <module>
NameError: name 'name' is not defined
>>> name = set(('max', 'tom', 'Den'))
>>> name
{'tom', 'max', 'Den'}
>>> Z = set([1,2,3,5])
>>> Z
{1, 2, 3, 5}
>>> A
{2, 4, 5, 7, 9, 10, 14, 15}
>>> B = {10, 11, 12, 13, 14, 16, 18}
>>> A | B
{2, 4, 5, 7, 9, 10, 11, 12, 13, 14, 15, 16, 18}
>>> A.union(B)
{2, 4, 5, 7, 9, 10, 11, 12, 13, 14, 15, 16, 18}
>>> A & B
{10, 14}
>>> A.intersection(B)
{10, 14}
>>> A - B
{2, 4, 5, 7, 9, 15}
>>> B - A
{16, 18, 11, 12, 13}
>>> A.difference(B)
{2, 4, 5, 7, 9, 15}
>>> B.difference(A)
{16, 18, 11, 12, 13}
>>> A ^ B
{2, 4, 5, 7, 9, 11, 12, 13, 15, 16, 18}
>>> B  ^ A
{2, 4, 5, 7, 9, 11, 12, 13, 15, 16, 18}
>>> A.symmetric_difference(B)
{2, 4, 5, 7, 9, 11, 12, 13, 15, 16, 18}
>>> A[0]
Traceback (most recent call last):
  File "<input>", line 1, in <module>
TypeError: 'set' object does not support indexing
>>> dir (A)
['__and__', '__class__', '__contains__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__iand__', '__init__', '__ior__', '__isub__', '__iter__', '__ixor__', '__le__', '__len__', '__lt__', '__ne__', '__new__', '__or__', '__rand__', '__reduce__', '__reduce_ex__', '__repr__', '__ror__', '__rsub__', '__rxor__', '__setattr__', '__sizeof__', '__str__', '__sub__', '__subclasshook__', '__xor__', 'add', 'clear', 'copy', 'difference', 'difference_update', 'discard', 'intersection', 'intersection_update', 'isdisjoint', 'issubset', 'issuperset', 'pop', 'remove', 'symmetric_difference', 'symmetric_difference_update', 'union', 'update']