Update app.py

app.py

@@ -70,13 +70,21 @@ def algorithms_cycle_detection():
         st.write("### Create Your Own Graph")
 
         # Input for creating custom graph
-        edges_input = st.text_area("Enter directed edges (e.g., (1, 2), (2, 3), (3, 4), (4, 2)):")
+        edges_input = st.text_area("Enter directed edges (e.g., (1, 2), (2, 3), (3, 4), (4, 2)):").strip()
 
         if st.button("Generate Graph"):
             if edges_input:
                 try:
-                    # Parse the input edges
-                    edges = [tuple(map(int, edge.strip()[1:-1].split(","))) for edge in edges_input.split(",")]
+                    # Parse the input edges, ensuring the format is correct
+                    edges = []
+                    for edge in edges_input.split(","):
+                        edge = edge.strip()
+                        if edge:  # Ensure the string is not empty
+                            # Convert string to tuple (e.g., "(1, 2)" -> (1, 2))
+                            edge_tuple = tuple(map(int, edge[1:-1].split(",")))
+                            edges.append(edge_tuple)
+
+                    # Create the graph
                     G = nx.DiGraph(edges)
 
                     st.write("Custom Graph:", G.edges())