Update app.py

app.py

@@ -15,11 +15,11 @@ st.title("Project Schedule/Gantt Chart Generator")
 
 project_name = st.text_input("Project Name:")
 start_date = st.date_input("Project Start Date:", value=datetime.today())
-end_date = st.date_input("Project End Date:", value=datetime.today() + timedelta(days=30))  # Default 30 days ahead
+end_date = st.date_input("Project End Date:", value=datetime.today() + timedelta(days=30))
 
 num_activities = st.number_input("Number of Activities (Minimum 1):", min_value=1, value=5)
 
-activities = []
+activities =
 for i in range(num_activities):
     col1, col2 = st.columns(2)
     with col1:
@@ -36,4 +36,19 @@ if st.button("Create Gantt Chart"):
     elif start_date > end_date:
         st.error("Start date cannot be after end date.")
     else:
-        df = pd.DataFrame(activities)
+        try:  # Try-except block for potential errors during chart creation
+            df = pd.DataFrame(activities)
+            df['Start'] = pd.to_datetime(start_date)
+            df['Finish'] = df['Start']
+
+            for i in range(len(df)):
+                if i > 0:
+                    df.loc[i, 'Start'] = df.loc[i - 1, 'Finish']
+                df.loc[i, 'Finish'] = df.loc[i, 'Start'] + pd.to_timedelta(df.loc[i, 'Duration'], unit='D')
+
+            df['Start_str'] = df['Start'].dt.strftime('%Y-%m-%d')
+            df['Finish_str'] = df['Finish'].dt.strftime('%Y-%m-%d')
+
+            data =
+            for _, row in df.iterrows():  # Use _ for index if not needed
+                data.