Write a Python program to set the difference between two sets.
Set1 = {1, 2, 3, 4, 5}
Set2 = {3, 4, 5, 6, 7}
def set_difference(Set1, Set2):
    return set(Set1) - set(Set2)

result = set_difference({1, 2, 3, 4, 5}, {3, 4, 5, 6, 7})
print(result)