dict_one = {"one": "one", "two": 2, "three": 3}
dict_two = {"three": 4, "five": 5}
# dict_one will be the union of both dictionaries
dict_one.update(dict_two)
print(dict_one)
# as of Python 3.9, you can use:
dict_one |= dict_two # similar to update() method
# Notice: All keys are unique inside a dictionary, so in case that
# both dictionaries have one or more identical keys, Python will use
# the values from the second dictionary for those keys