Update app.py

app.py

@@ -70,20 +70,38 @@ 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(",")]
-                    if not edges:
-                        st.error("No valid edges provided.")
-                    else:
+                    edges = []
+                    # Ensure correct formatting of the input string
+                    edge_strings = edges_input.split("),")
+                    for edge_str in edge_strings:
+                        edge_str = edge_str.strip()
+                        if edge_str:
+                            # Handle the case where the edge might be missing a closing parenthesis
+                            if edge_str[-1] != ")":
+                                edge_str += ")"
+                            # Remove the opening and closing parentheses
+                            edge_tuple = edge_str.strip("()").split(",")
+                            if len(edge_tuple) == 2:
+                                try:
+                                    # Safely convert to integers and add the edge
+                                    edge_tuple = tuple(map(int, edge_tuple))
+                                    edges.append(edge_tuple)
+                                except ValueError:
+                                    st.error(f"Invalid edge format: {edge_str}")
+                                    return
+
+                    if edges:
+                        # Create the graph
                         G = nx.DiGraph(edges)
                         st.write("Custom Graph:", G.edges())
                         plot_cycle_detection(G)
-
+                    else:
+                        st.error("No valid edges provided.")
                 except Exception as e:
                     st.error(f"Error creating the graph: {e}")
             else: