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How to use _delete_node method in lisa

Best Python code snippet using lisa_python

d.py

Source:d.py

...13    def insert(self, val):14        self.root = self._insert_node(self.root, val)15 16    def delete(self, val):17        self.root = self._delete_node(self.root, val)18 19    def _insert_node(self, cur, val):20        if not cur:21            return TreeNode(val)22        elif val < cur.val:23            cur.left = self._insert_node(cur.left, val)24        elif val > cur.val:25            cur.right = self._insert_node(cur.right, val)26 27        cur.height = 1 + max(self._get_height(cur.left),28                             self._get_height(cur.right))29 30        balance = self._get_balance(cur)31        if balance > 1 and val > cur.left.val: # Left-Right case32            cur.left = self._left_rotate(cur.left)33            cur = self._right_rotate(cur)34 35        elif balance > 1 and val < cur.left.val: # Left-Left case36            cur = self._right_rotate(cur)37 38        elif balance < -1 and val > cur.right.val: # Right-Right case39            cur = self._left_rotate(cur)40 41        elif balance < -1 and val < cur.right.val: # Right-Left case42            cur.right = self._right_rotate(cur.right)43            cur = self._left_rotate(cur)44        return cur45 46    def _delete_node(self, cur, val):47        if not cur:48            return False49        elif cur == self.root and cur.val == val:50            if cur.left and cur.right:51                pre_val = self._find_predecessor(cur.left)52                self._delete_node(cur, pre_val)53                cur.val = pre_val54            elif cur.left or cur.right:55                if cur.left:56                    self.root = cur.left57                elif cur.right:58                    self.root = cur.right59            else:60                self.root = None61 62        elif cur.left and cur.left.val == val:63            if cur.left.left and cur.left.right:64                pre_val = self._find_predecessor(cur.left.left)65                self._delete_node(cur, pre_val)66                cur.left.val = pre_val67                cur.left.height = 1 + \68                    max(self._get_height(cur.left.left),69                        self._get_height(cur.left.right))70            elif cur.left.left or cur.left.right:71                if cur.left.left:72                    cur.left = cur.left.left73                elif cur.left.right:74                    cur.left = cur.left.right75                cur.left.height = 1 + \76                    max(self._get_height(cur.left.left),77                        self._get_height(cur.left.right))78            else:79                cur.left = None80            cur.height = 1 + max(self._get_height(cur.left),81                                 self._get_height(cur.right))82 83        elif cur.right and cur.right.val == val:84            if cur.right.left and cur.right.right:85                pre_val = self._find_predecessor(cur.right.left)86                self._delete_node(cur, pre_val)87                cur.right.val = pre_val88                cur.right.height = 1 + \89                    max(self._get_height(cur.right.left),90                        self._get_height(cur.right.right))91            elif cur.right.left or cur.right.right:92                if cur.right.left:93                    cur.right = cur.right.left94                elif cur.right.right:95                    cur.right = cur.right.right96                cur.right.height = 1 + \97                    max(self._get_height(cur.right.left),98                        self._get_height(cur.right.right))99            else:100                cur.right = None101            cur.height = 1 + max(self._get_height(cur.left),102                                 self._get_height(cur.right))103 104        elif cur.val > val:105            cur.left = self._delete_node(cur.left, val)106 107        elif cur.val < val:108            cur.right = self._delete_node(cur.right, val)109 110        balance = self._get_balance(cur)111        # Left-Left case112        if balance > 1 and self._get_balance(cur.left) >= 0:113            cur = self._right_rotate(cur)114        # Left-Right case115        elif balance > 1 and self._get_balance(cur.left) < 0:116            cur.left = self._left_rotate(cur.left)117            cur = self._right_rotate(cur)118        # Right-Left case119        elif balance < -1 and self._get_balance(cur.right) > 0:120            cur.right = self._right_rotate(cur.right)121            cur = self._left_rotate(cur)122        # Right-Right case...

treap.py

Source:treap.py

...81                node = node.left_rotate()82        return node83    def insert(self, value):84        self.root = self._insert_node(self.root, value)85    def _delete_node(self, node, value):86        if not node:87            raise ValueError('Not found')88        if value == node.value:89            if (node.left is None) and (node.right is None):  # Leaf nodes can be simply deleted.90                self.size -= 191                return None92            elif node.left is None:93                self.size -= 194                return node.right95            elif node.right is None:96                self.size -= 197                return node.left98            elif node.left and node.right:99                if node.left.priority < node.right.priority:100                    node = node.right_rotate()101                    node.right = self._delete_node(node.right, value)102                else:103                    node = node.left_rotate()104                    node.left = self._delete_node(node.left, value)105        elif value < node.value:106            node.left = self._delete_node(node.left, value)107        elif value > node.value:108            node.right = self._delete_node(node.right, value)109        return node110    def delete(self, value):111        self.root = self._delete_node(self.root, value)112    def inorder_traverse(self, node):113        if not node:114            return115        yield from self.inorder_traverse(node.left)116        yield node.value117        yield from self.inorder_traverse(node.right)118    def levelorder_traverse_nodes(self, node=DEFAULT_TO_ROOT):119        if node == self.DEFAULT_TO_ROOT:120            node = self.root121        current_level = [node, ]122        while current_level:123            next_level = []124            for node in current_level:125                if node:...

Binary_Search_Tree.py

Source:Binary_Search_Tree.py

...68    def delete_node(self, data):69        if self.node is None:70            return False71        else:72            self.node = self._delete_node(data, self.node)73    def _delete_node(self, data, cur_node):74        if cur_node is None:75            return cur_node76        if data < cur_node.root:77            cur_node.left = self._delete_node(data, cur_node.left)78        elif data > cur_node.root:79            cur_node.right = self._delete_node(data, cur_node.right)80        else:81            # åãã¼ããä¸ã¤ã¾ãã¯ãªãã®å ´å82            if cur_node.left is None:83                tmp = cur_node.right84                cur_node = None85                return tmp86            elif cur_node.right is None:87                tmp = cur_node.left88                cur_node.left = None89                return tmp90            # åãã¼ãã2ã¤ã®å ´åã¯å³å´ã®ä¸çªå°ããå¤91            tmp = self.find_min(cur_node.right)92            cur_node.root = tmp.root93            cur_node.right = self._delete_node(tmp.root, cur_node.right)94        return cur_node95    # æ¢ç´¢ ã«ã¼ãç ã¡ã½ãã96    def find_by_while(self, data):97        if self.node is None:98            return None99        cur_node = self.node100        while cur_node:101            if data == cur_node.root:102                return True103            if data < cur_node.root:104                cur_node = cur_node.left105            else:106                cur_node = cur_node.right107        return False...

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