# Cannot conbime with C416. Should use set comprehension here. even_nums = set(2 * x for x in range(3)) odd_nums = set( 2 * x + 1 for x in range(3) ) small_nums = f"{set(a if a < 6 else 0 for a in range(3))}" def f(x): return x print(f"Hello {set(f(a) for a in 'abc')} World") print(f"Hello { set(f(a) for a in 'abc') } World") # Short-circuit case, combine with C416 and should produce x = set(range(3)) x = set(x for x in range(3)) x = set( x for x in range(3) ) print(f"Hello {set(a for a in range(3))} World") print(f"{set(a for a in 'abc') - set(a for a in 'ab')}") print(f"{ set(a for a in 'abc') - set(a for a in 'ab') }") # Not built-in set. def set(*args, **kwargs): return None set(2 * x for x in range(3)) set(x for x in range(3))