Three Hundred - Thirty-One Commit: Implement edge_count() function

Author: AAdewunmi

Section_12(Graphs)/(1)_graph.py

@@ -61,4 +61,12 @@ def exist_edge(self, u, v):
         return self._adjacent_matrix[u][v] != 0
 
     def vertex_count(self):
-        return self._vertices
+        return self._vertices
+
+    def edge_count(self):
+        count = 0
+        for i in range(self._vertices):
+            for j in range(self._vertices):
+                if self._adjacent_matrix[i][j] != 0:
+                    count = count + 1
+        return count