find the union of two maps in python

To find the union of two maps (or dictionaries) in Python, you can use the built-in update() method to merge the keys and values of one map into the other. Here's an example:

main.py
map1 = {"a": 1, "b": 2, "c": 3}
map2 = {"b": 4, "d": 5, "e": 6}

map1.update(map2)

print(map1)  # Output: {'a': 1, 'b': 4, 'c': 3, 'd': 5, 'e': 6}
148 chars
7 lines

In this example, map1 is updated with the contents of map2. Any keys that correspond to a value in map1 are updated with the value from map2, and any new keys in map2 are added to map1.

Alternatively, you can use the | operator (pipe operator) to merge two dictionaries, which was introduced in Python version 3.9:

main.py
map1 = {"a": 1, "b": 2, "c": 3}
map2 = {"b": 4, "d": 5, "e": 6}

union_map = map1 | map2

print(union_map)  # Output: {'a': 1, 'b': 4, 'c': 3, 'd': 5, 'e': 6}
159 chars
7 lines

In this example, the | operator merges the two dictionaries into a new dictionary named union_map. The resulting dictionary contains all the key-value pairs from map1 and map2. If there are any keys that are present in both the maps, the value of the key in the second dictionary (map2) is used.