Add Binary Search Tree in data_structures

.gitignore

@@ -88,3 +88,4 @@ ENV/
 # Rope project settings
 .ropeproject
 .idea
+.DS_Store

.travis.yml

@@ -12,4 +12,4 @@ install:
   - if [ "$TRAVIS_PYTHON_VERSION" == "3.2" ]; then travis_retry pip install coverage==3.7.1; fi
   - if [ "$TRAVIS_PYTHON_VERSION" != "3.2" ]; then travis_retry pip install coverage; fi
   - "pip install pytest pytest-cov"
-script: py.test --doctest-modules --cov ./
+script: py.test --doctest-modules --cov ./

data_structures/Binary Tree/binary_seach_tree.py

@@ -0,0 +1,101 @@
+'''
+A binary search Tree
+'''
+class Node:
+
+    def __init__(self, label):
+        self.label = label
+        self.left = None
+        self.rigt = None
+
+    def getLabel(self):
+        return self.label
+
+    def setLabel(self, label):
+         self.label = label
+
+    def getLeft(self):
+        return self.left
+
+    def setLeft(self, left):
+        self.left = left
+
+    def getRight(self):
+        return self.rigt
+
+    def setRight(self, right):
+        self.rigt = right
+
+
+class BinarySearchTree:
+
+    def __init__(self):
+        self.root = None
+
+    def insert(self, label):
+
+        #Create a new Node
+
+        node = Node(label)
+
+        if self.empty():
+            self.root = node
+        else:
+            dad_node = None
+            curr_node = self.root
+
+            while True:
+                if curr_node != None:
+
+                    dad_node = curr_node
+
+                    if node.getLabel() < curr_node.getLabel():
+                        curr_node = curr_node.getLeft()
+                    else:
+                        curr_node = curr_node.getRight()
+                else:
+                    if node.getLabel() < dad_node.getLabel():
+                        dad_node.setLeft(node)
+                    else:
+                        dad_node.setRight(node)
+                    break
+
+    def empty(self):
+        if self.root == None:
+            return True
+        return False
+
+    def preShow(self, curr_node):
+        if curr_node != None:
+            print(curr_node.getLabel(), end=" ")
+
+            self.preShow(curr_node.getLeft())
+            self.preShow(curr_node.getRight())
+
+    def getRoot(self):
+        return self.root
+
+
+'''
+Example
+            8
+           / \
+          3   10
+         / \    \
+        1   6    14
+           / \   /
+          4   7 13 
+'''
+
+t = BinarySearchTree()
+t.insert(8)
+t.insert(3)
+t.insert(1)
+t.insert(6)
+t.insert(4)
+t.insert(7)
+t.insert(10)
+t.insert(14)
+t.insert(13)
+
+t.preShow(t.getRoot())