Python Set - union method

Method signature:

union(anotherSet_in)

Method overview:

Produces a new set containing the union of elements from two sets.
While the new set is created afresh its elements are shallow copies from set1 and set2 involved in the union operation.

Parameters:

anotherSet_in: The second set of the union operation.

Example:

# Example Python program that takes the union of two sets

# Create sets of great lakes based on a criterion
onlyInUS = {"Lake Michigan"}
inUSAndCanada = {"Lake Superior", "Lake Huron", "Lake Erie", "Lake Ontario"}

# Take a union of great lakes
greatLakes = onlyInUS.union(inUSAndCanada)
print(greatLakes)
print(id(onlyInUS))
print(id(inUSAndCanada))

Output:

{'Lake Michigan', 'Lake Superior', 'Lake Erie', 'Lake Ontario', 'Lake Huron'}

4377792736

4377791392

4377793856