list union python

1set1 = {2, 4, 5, 6}  
2set2 = {4, 6, 7, 8}  
3set3 = {7, 8, 9, 10} 
4  
5# union of two sets 
6print("set1 U set2 : ", set1.union(set2)) 
7  
8# union of three sets 
9print("set1 U set2 U set3 :", set1.union(set2, set3)) 
10
11
12>>>
13
14set1 U set2 :  {2, 4, 5, 6, 7, 8}
15set1 U set2 U set3 : {2, 4, 5, 6, 7, 8, 9, 10}

1set1 = {2, 4, 5, 6}  
2set2 = {4, 6, 7, 8}  
3set3 = {7, 8, 9, 10} 
4  
5# union of two sets 
6print("set1 U set2 : ", set1.union(set2)) 
7  
8# union of three sets 
9print("set1 U set2 U set3 :", set1.union(set2, set3))