CODEWITHSUNDEEP
pythonset
Sai Swaroop Naidu
Sai Swaroop Naidu

Reputation: 165

Comparing two sets in python

Why do I get the results shown?

>>> x = {"a","b","1","2","3"}  
>>> y = {"c","d","f","2","3","4"}  
>>> z=x<y        
>>> print(z)
False
>>> z=x>y
>>> print(z)
False

Upvotes: 12

Views: 21231

Answers (3)

jaime
jaime

Reputation: 2344

Straight from the python documentation --

In addition, both Set and ImmutableSet support set to set comparisons. Two sets are equal if and only if every element of each set is contained in the other (each is a subset of the other). A set is less than another set if and only if the first set is a proper subset of the second set (is a subset, but is not equal). A set is greater than another set if and only if the first set is a proper superset of the second set (is a superset, but is not equal).

Upvotes: 7

Priyank
Priyank

Reputation: 1639

When working with sets, > and < are relational operators. hence, these operations are used to see if one set is the proper subset of the other, which is False for as neither is the proper subset of the other.

Upvotes: 2

FHTMitchell
FHTMitchell

Reputation: 12156

The < and > operators are testing for strict subsets. Neither of those sets is a subset of the other.

{1, 2} < {1, 2, 3}  # True
{1, 2} < {1, 3}  # False
{1, 2} < {1, 2}  # False -- not a *strict* subset
{1, 2} <= {1, 2}  # True -- is a subset

Upvotes: 35

Related Questions