Sets¶

Set is unordered collection of unique items

In [61]:

myset = {'a','b','c','d','a','b','e','f','g'}
print (myset) # notice no repetition values

{'e', 'd', 'f', 'b', 'c', 'a', 'g'}

Membership Test¶

In [62]:

print ('a' in myset)      # is member ?
print ('f' not in myset)  # is not member ?

True
False

Subset Test¶

Subset Test : <= Proper Subset Test : <

In [63]:

mysubset = {'d','g'}
mysubset <= myset

Out[63]:

True

Proper Subset test that the master set contain at least one element which is not in the subset

In [64]:

mysubset = {'b','a','d','c','e','f','g'}
print ('Is Subset : ', mysubset <= myset)
print ('Is Proper Subet : ', mysubset < myset)

Is Subset :  True
Is Proper Subet :  False

Union using '|'¶

In [65]:

{'a','b','c'} | {'e','f'}

Out[65]:

{'a', 'b', 'c', 'e', 'f'}

Intersection using '&'¶

Any elments that exist in both left and right set

In [66]:

{'a','b','c','d'} & {'c','d','e','f'}

Out[66]:

{'c', 'd'}

Difference using '-'¶

Anything in left that is not in right

In [67]:

{'a','b','c','d'} - {'c','d','e','f'}

Out[67]:

{'a', 'b'}