hashset remove helper function class __placeholderdef __init__(self)pass def __eq__(self,other)return false def __remove(item,items)idx hash(itemlen(items while items[idx!noneif items[idx=itemnextidx (idx len(itemsif items[nextidx=noneitems[idxnone elseitems[idxhashset __placeholder(return true idx (idx len(items return false when removing an itemthe load factor may get too low to be efficiently using space in memory when the load factor dips below %the list is again rehashed to decrease the list size by one half to increase the load factor the remove method is provided in sect hashset remove def remove(selfitem)if hashset __remove(item,self items)self numitems - load max(self numitems len(self itemsif load < self items hashset __rehash(self items,[none]*int(len(self items)/ )elseraise keyerror("item not in hashset"for the same reason that adding value can be done in ( timedeleting value can also be done with an amortized complexity of ( the discard method is nearly the same of the remove method presented in sect except that no exception is raised if the item is not in the set when it is discarded finding an item to find an item in hash set involves hashing the item to find its address and then searching the possible chain of values the chain terminates with none if the item is in the chain somewhere then the __contains__ method will return true and false will be returned otherwise the method in sect is called when item in set is written in program this copy belongs to 'acha