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修炼4
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集合
建立 set() ={},集合没有顺序,由不可改变的数字 ,字符串,元组构成
元组的方法
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class set ( object ): """ set() -> new empty set object set(iterable) -> new set object Build an unordered collection of unique elements. """ def add( self , * args, * * kwargs): # real signature unknown """ Add an element to a set,添加元素 This has no effect if the element is already present. """ pass def clear( self , * args, * * kwargs): # real signature unknown """ Remove all elements from this set. 清除内容""" pass def copy( self , * args, * * kwargs): # real signature unknown """ Return a shallow copy of a set. 浅拷贝 """ pass def difference( self , * args, * * kwargs): # real signature unknown """ Return the difference of two or more sets as a new set. A中存在,B中不存在 (i.e. all elements that are in this set but not the others.) """ pass def difference_update( self , * args, * * kwargs): # real signature unknown """ Remove all elements of another set from this set. 从当前集合中删除和B中相同的元素""" pass def discard( self , * args, * * kwargs): # real signature unknown """ Remove an element from a set if it is a member. If the element is not a member, do nothing. 移除指定元素,不存在不保错 """ pass def intersection( self , * args, * * kwargs): # real signature unknown """ Return the intersection of two sets as a new set. 交集 (i.e. all elements that are in both sets.) """ pass def intersection_update( self , * args, * * kwargs): # real signature unknown """ Update a set with the intersection of itself and another. 取交集并更更新到A中 """ pass def isdisjoint( self , * args, * * kwargs): # real signature unknown """ Return True if two sets have a null intersection. 如果没有交集,返回True,否则返回False""" pass def issubset( self , * args, * * kwargs): # real signature unknown """ Report whether another set contains this set. 是否是子序列""" pass def issuperset( self , * args, * * kwargs): # real signature unknown """ Report whether this set contains another set. 是否是父序列""" pass def pop( self , * args, * * kwargs): # real signature unknown """ Remove and return an arbitrary set element. Raises KeyError if the set is empty. 移除元素 """ pass def remove( self , * args, * * kwargs): # real signature unknown """ Remove an element from a set; it must be a member. If the element is not a member, raise a KeyError. 移除指定元素,不存在保错 """ pass def symmetric_difference( self , * args, * * kwargs): # real signature unknown """ Return the symmetric difference of two sets as a new set. 对称差集 (i.e. all elements that are in exactly one of the sets.) """ pass def symmetric_difference_update( self , * args, * * kwargs): # real signature unknown """ Update a set with the symmetric difference of itself and another. 对称差集,并更新到a中 """ pass def union( self , * args, * * kwargs): # real signature unknown """ Return the union of sets as a new set. 并集 (i.e. all elements that are in either set.) """ pass def update( self , * args, * * kwargs): # real signature unknown """ Update a set with the union of itself and others. 更新 """ pass |
修炼4
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