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Update bst.py #54

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8 changes: 2 additions & 6 deletions bst.py
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Original file line number Diff line number Diff line change
Expand Up @@ -275,12 +275,10 @@ def _rotate_right(self):
if self.left is not None:
self.left.parent = self
pivot.left = pivot.right
if pivot.left is not None:
pivot.left.parent = pivot
pivot.right = self.right
if pivot.right is not None:
pivot.right.parent = pivot
self.right, pivot.parent = pivot, self
self.right = pivot

def _rotate_left(self):
"""Perform a single left tree rotation."""
Expand All @@ -292,12 +290,10 @@ def _rotate_left(self):
if self.right is not None:
self.right.parent = self
pivot.right = pivot.left
if pivot.right is not None:
pivot.right.parent = pivot
pivot.left = self.left
if pivot.left is not None:
pivot.left.parent = pivot
self.left, pivot.parent = pivot, self
self.left = pivot

def _self_balance(self):
"""Balance the subtree from given node."""
Expand Down