Python Learning Relationship test for the 16th day collection

When doing data analysis, to a set of analysis, and analysis of the relationship between multiple sets of analysis, then with the traditional cycle of comparison trouble, the collection provides a lot of methods, it is easy to compare the relationship of multiple sets, and set, intersection, difference set, symmetric difference set.

n1={1,2,4,6}

n2={2,3,5,6}

1. Usage of the intersection

N3=n1.intersection (N2)

n3={2,6}

or N3=N1&N2.

2, usage of the difference set

The difference of N1

N1.difference (N2)

N2.difference (N1)

or N1-N2, n2-n1.

3, the usage of the set

N1.union (N2)

or N1 | N2

4, Symmetrical difference set

Find the opposite value of the intersection

N1.symmetric_difference (N2)  

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Python Learning Relationship test for the 16th day collection