Create singly_LinkedList.py (#110)

* Create singly_LinkedList.py

* Update singly_LinkedList.py

* Update singly_LinkedList.py

* Update singly_LinkedList.py

* Update singly_LinkedList.py

* Update singly_LinkedList.py

Author: avkaran-singh

Diff for: data_structures/LinkedList/singly_LinkedList.py

@@ -0,0 +1,61 @@
+class Node:#create a Node
+    def __int__(self,data):
+        self.data=data#given data
+        self.next=None#given next to None
+class Linked_List:
+    pass
+    def insert_tail(Head,data):#insert the data at tail
+        tamp=Head#create a tamp as a head
+        if(tamp==None):#if linkedlist is empty
+            newNod=Node()#create newNode Node type and given data and next
+            newNod.data=data
+            newNod.next=None
+            Head=newNod
+        else:
+            while tamp.next!=None:#find  the last Node
+                tamp=tamp.next
+            newNod = Node()#create a new node
+            newNod.data = data
+            newNod.next = None
+            tamp.next=newNod#put the newnode into last node
+        return Head#return first node  of  linked list  
+    def insert_head(Head,data):
+        tamp = Head
+        if (tamp == None):
+            newNod = Node()#create a new Node
+            newNod.data = data
+            newNod.next = None
+            Head = newNod#make new node to Head       
+        else:
+            newNod = Node()
+            newNod.data = data
+            newNod.next = Head#put the Head at NewNode Next
+            Head=newNod#make a NewNode to Head
+        return Head   
+    def Print(Head):#print every node data
+        tamp=Node()
+        tamp=Head
+        while tamp!=None:
+            print(tamp.data)
+            tamp=tamp.next
+    def delete_head(Head):#delete from head
+        if Head!=None:
+            Head=Head.next
+        return Head#return new Head
+    def delete_tail(Head):#delete from tail
+        if Head!=None:
+            tamp = Node()
+            tamp = Head
+            while (tamp.next).next!= None:#find the 2nd last element
+                tamp = tamp.next
+            tamp.next=None#delete the last element by give next None to 2nd last Element
+        return Head
+    def isEmpty(Head):
+        if(Head==None):#check Head is None  or Not
+            return True#return Ture if list is empty
+        else:
+            return False#check False if it's not empty
+
+
+
+