python--Base Collection

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The function of the collection and the Good helper, the collection is also unordered   & intersection |  Set-  Difference set ^ symmetric difference set
   Collection additions and deletions change
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List_1 =[1,2,3,4,5,6,3,7,9,2]
List2=set ([1,2,11,121,211])
List_1=set (list_1)
#print (List_1,type (list_1))
Print (LIST_1,LIST2)
"' Intersection--the same element   determines if there is an intersection isdisjoint ()  ' '
Print (List_1.intersection (LIST2))
Print (List_1 & List2)
"Take and set"
Print (List_1.union (LIST2))
Print (list_1 | list2)
"Take the difference set in list_1 and not in   List2 '"
Print (List_1.difference (LIST2))
Print (LIST_1-LIST2)
"' judgment is not a subset in turn can see if there is a parent issupsubset ' '   
Print (List_1.issubset (LIST2))
"Reverse differential set"
Print (List_1.symmetric_difference (LIST2))
Print (LIST_1^LIST2)

' Add ' '
List_1.add (1000000)
List_1.update ([888,777,666,555])
Print (list_1)
' Delete '
Print (List_1.pop ())
Print (List_1.pop ())
Print (List_1.pop ())
Print (List_1.pop ())
' Take the set length '
Print (len (list_1))
"x   in Y to determine if x is in Y"

python--Base Collection