Comparing two sets in python

Question

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

Answer 1

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