Python Sets have mathematical set operations like union, intersection, difference, and symmetric difference. You can do this operation using the operators or inbuilt methods.

*See below Operator for set operations:*

- | for union
- & for intersection
- – for difference
- ^ for symmetric difference

**Python set operations exmaples**

Simple example code.

**Set Union, S1|S2 operation**

Union is performed using | operator or using the union() method.

```
fib = {1, 1, 2, 3, 5, 8}
prime = {2, 3, 5, 7, 11}
print(fib | prime)
# or using method
res = fib.union(prime)
print(res)
```

**Output**: {1, 2, 3, 5, 7, 8, 11}

**Set Intersection, S1&S2 operation**

The intersection is performed using & operator using the intersection() method.

```
fib = {1, 1, 2, 3, 5, 8}
prime = {2, 3, 5, 7, 11}
print(fib & prime)
# or using method
res = fib.intersection(prime)
print(res)
```

**Output**: {2, 3, 5}

**Set Difference, S1-S2** **operation**

The difference is performed using – operator or using the difference() method.

```
fib = {1, 1, 2, 3, 5, 8}
prime = {2, 3, 5, 7, 11}
print(fib - prime)
# or using method
res = fib.difference(prime)
print(res)
```

**Output**: {8, 1}

**Set Symmetric Difference, S2^S2** **operation**

The symmetric difference is performed using the ^ operator or using the symmetric_difference() method.

```
fib = {1, 1, 2, 3, 5, 8}
prime = {2, 3, 5, 7, 11}
print(fib ^ prime)
# or using method
res = fib.symmetric_difference(prime)
print(res)
```

**Output**: {1, 7, 8, 11}

**Easy to understand**

Operation | Notation | Meaning |
---|---|---|

Intersection | A ∩ B | all elements which are in both and |

Union | A ∪ B | all elements which are in either or (or both) |

Difference | A − B | all elements which are in but not in |

Complement | (or) | all elements which are not in |

Sets and frozen sets support the following operators –

```
key in s # containment check
key not in s # non-containment check
s1 == s2 # s1 is equivalent to s2
s1 != s2 # s1 is not equivalent to s2
s1 <= s2 # s1is subset of s2 s1 < s2 # s1 is proper subset of s2 s1 >= s2 # s1is superset of s2
s1 > s2 # s1 is proper superset of s2
s1 | s2 # the union of s1 and s2
s1 & s2 # the intersection of s1 and s2
s1 – s2 # the set of elements in s1 but not s2
s1 ˆ s2 # the set of elements in precisely one of s1 or s2
```

Do comment if you have any doubts and suggestions on this Python set basic tutorial.

Note:IDE: PyCharm 2021.1.3 (Community Edition)Windows 10

Python 3.7All

Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.

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