This gist demonstrates the usage of `set()` and `{}` for building sets in python and when one is preferred over the other

set_literal_vs_set_method.py

import dis


def non_empty_set_literal():
    return {1, 2, 3}  # Build a set {1, 2, 3}

def non_empty_set_method():
    return set([1, 2, 3])  # Builds a set {1, 2, 3} from a list

def empty_set_literal():  
    return {}  # Does NOT work => Generates an empty dict {}

def empty_set_method():
    return set()  # Generates an empty set

dis.dis(non_empty_set_literal)
dis.dis(non_empty_set_method)