human
check if set is a subset.
assistant
Here is a Python code to check if set is a subset of a set

def is_subset(a, b):
    """
    Check if set is a subset.
    """
    return a.issubset(b)

# Enter the set
a = set([1, 2, 3])
b = set([1, 2, 3, 4])

# Calling the function
print((is_subset(a, b)))

#Example Output
# True

#Remember to inspect code for bugs.