adding Depth-first search using python

algorithms/Python/searching/Depth-first search.py

@@ -0,0 +1,32 @@
+# this graph to check the algorithm
+graph={
+    'S':['B','D','A'],
+    'A':['C'],
+    'B':['D'],
+    'C':['G','D'],
+    'S':['G'],
+}
+#function of DFS
+def BFS(graph,start,goal):
+    Visited=[]
+    queue=[[start]]
+    while queue:
+        path=queue.pop() 
+        node=path[-1]
+        if node in Visited:
+            continue
+        Visited.append(node)
+        if node==goal:
+            return path
+        else:
+            adjecent_nodes=graph.get(node,[])
+            for node2 in adjecent_nodes:
+                new_path=path.copy()
+                new_path.append(node2)
+                queue.append(new_path)
+
+
+
+
+Solution=BFS(graph,'S','G')
+print('Solution is ',Solution)