if set('abc') <= set(my_list):
    print('matches')
superset = 'a', 'b', 'c', 'd'
subset = 'a', 'b'
desired = set(('a', 'b', 'c'))
assert desired <= set(superset)
assert desired.issubset(superset)
assert desired <= set(subset)
Pythonic way of checking if several elements are in a list