Adding Data Structure foundation

Added a python linked_list example

Author: Brabec

Data Structures/Linked List/Python/LinkedList.py

@@ -0,0 +1,62 @@
+class node:
+    def __init__(self):
+        self.data = None
+        self.next = None
+
+class linked_list:
+    def __init__(self):
+        self.head = None
+
+    def add(self, data):
+        new_node = node()
+        new_node.data = data
+        new_node.next = self.head
+        self.head = new_node
+
+    def remove(self, data):
+
+        prev = None
+        node = self.head
+        while node:
+            if node.data == data:
+                if prev:
+                    prev.next = node.next
+                else:
+                    self.head = node.next
+                return True
+            prev = node
+            node = node.next
+        return False
+
+    def list_print(self):
+        node = self.head
+        while node:
+            print node.data
+            node = node.next
+
+    def search_data(self, data):
+        node = self.head
+        while node:
+            if (node.data == data):
+                return True
+            node = node.next
+        return False
+
+# Creating the list
+ll = linked_list()
+
+# Adding elements
+ll.add(1)
+ll.add(2)
+ll.add(3)
+
+# Printing the list
+ll.list_print()
+
+ll.remove(3)
+
+# Printing the list after removing element
+ll.list_print()
+
+# Searching for an element that doesn't exist
+ll.search_data(20)