handlearrival() handlebeginservice() handleendservice() handlexyz() hash() hash chains hash code hash function hash map hash table - closed hashing double hashing linear probing open hashing quadratic probing hashing hashmap py haskey() head reference heap - order property shape property heapsort height height-balance property helper method hierarchical structure histogram home position htsearch() idnum() immutable object import modules - index() infix information hiding inorder traversal input() - insert() insertion sort insertionsort() insertnode() instance instance scope instance variable instantiated interface interior node intersect() interset() iomod py is- relationship isempty() isequal() isequinox() isfinished() isfree() isfull() isleaf() isleapyear() issolstice() issubsetof() isvalidgregorian() isvalidsource() isvertical() isweekday() iterator - julian calendar key keyarray() keyword arguments knapsack problem knight' tour last-in first-out leaf node left child len() length() lettergrade() level level order traversal lexicographical order life grid life grid life py lifegrid class lifo line class line py line segment linear probe linear search linear time