Python - set - operations

print('\n--- data1 ---\n')
data1 = set(["hi", "hello", "hallo"])
print(data1)
# different order {'hi', 'hallo', 'hello'}

print('\n--- data2 ---\n')
data2 = set(["hello", "hey", "hello", "hey", "hello", "hey"])
print(data2)
# remove duplicate elements
# {'hey', 'hello'}

print('\n--- data2 & data1 ---\n')
print(data2 & data1)
# common elements
# elements which exists in both at the same time
# {'hello'}

print('\n--- data2 | data1 ---\n')
print(data2 | data1)
# all elements from both
# {'hi', 'hello', 'hallo', 'hey'}

print('\n--- data2 ^ data1 ---\n')
print(data2 ^ data1)
# elements which exists only in data1 or only in data2
# but not in both at the same time
# {'hey', 'hi', 'hallo'}

print('\n--- data2 - data1 ---\n')
print(data2 - data1)
# remove data1 from data2
# {'hey'}

'''
--- data1 ---

{'hi', 'hallo', 'hello'}

--- data2 ---

{'hey', 'hello'}

--- data2 & data1 ---

{'hello'}

--- data2 | data1 ---

{'hi', 'hello', 'hallo', 'hey'}

--- data2 ^ data1 ---

{'hey', 'hi', 'hallo'}

--- data2 - data1 ---

{'hey'}
'''