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开始学习

问题		答案
Returns a set, that is the intersection of two other sets. 开始学习		. intersection() / &
Removes the items in this set that are not present in other, specified set(s). 开始学习		. intersection_update() / &=
Returns a set containing the union of sets 开始学习		. union() / \|
Update the set with the union of this set and others 开始学习		. update() / \|=
Returns a set containing the difference between two or more sets. 开始学习		. difference() / -
Removes the items in this set that are also included in another, specified set. 开始学习		. difference_update() / -=
Returns a set with the symmetric differences of two sets 开始学习		. symmetric_difference() / ^
Inserts the symmetric differences from this set and another 开始学习		. symmetric_difference_update() / ^=
Returns a copy of the set. 开始学习		. copy()
Removes all the elements from the set. 开始学习		. clear()
Adds an element to the set. 开始学习		. add()
Removes the specified element. 开始学习		. remove()
Remove the specified item. 开始学习		. discard()
Removes an element from the set 开始学习		. pop()
Returns whether two sets have a intersection or not. 开始学习		. isdisjoint()
Returns whether another set contains this set or not. 开始学习		. issubset()
Returns whether this set contains another set or not. 开始学习		. issuperset()
Returns the length of a set. (Inner method.) 开始学习		. __len__

Set Methods