A brief explanation of set collections in Python (with examples)

This article brings you a simple explanation of set collections in Python (with examples). It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

The set collection uses {} to save a set of iterable objects, such as lists, strings, and the set collection itself. If there are duplicate elements in the set, the duplicate elements will be automatically removed

a=set([1,2,3])
print(a)
b=set('hello python')
print(b)
c=set({1,2,3})
print(c)
d=set({'hello python'})
print(type({'hello '}))
print(d)

Display results

 {1, 2, 3}
 {'h', 'l', 'e', ' ', 'p', 'n', 'y', 'o', 't'}
 {1, 2, 3}
 <class &#39;set&#39;>
 {&#39;hello python&#39;}

Assume a=set( [1,2,3])

add	After adding an element to the set collection, replace the original object	a.add( 4) print(a) output {1, 2, 3, 4}
remove	After removing an element from the set collection, replace the original object. If If the replaced element is not in the set collection, an error will be reported	a.remove(2) print(a) output {1,3}

Little knowledge points: set collection can be seen as It is a mathematically unordered and non-repeating set of elements, so the intersection and union in the mathematical sense can be done between the two sets

##a&bOutput result{1,3}a |bOutput result{1,2,3,4}

Assume a=set([1,2,3] ) b=set([1,3])

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