Update app.py

app.py

@@ -556,8 +556,8 @@ async def process_logs(file_obj, lab_site_filter, equipment_type_filter, date_ra
 
             # Handle mixed timestamp formats with ISO8601 and coerce errors
             df["timestamp"] = pd.to_datetime(df["timestamp"], format='ISO8601', errors='coerce')
-            # Apply UTC timezone if not present, then convert to IST
-            df["timestamp"] = df["timestamp"].dt.tz_localize('UTC', ambiguous='raise', nonexistent='shift_forward').dt.tz_convert('Asia/Kolkata')
+            # Convert UTC-aware timestamps to IST directly
+            df["timestamp"] = df["timestamp"].dt.tz_convert('Asia/Kolkata')
             df["amc_date"] = pd.to_datetime(df["amc_date"], format='%m/%d/%Y', errors='coerce').dt.tz_localize('UTC').dt.tz_convert('Asia/Kolkata')
             if df.empty:
                 return "No data available.", "<p>No data available.</p>", None, '<p>No device cards available.</p>', None, None, None, None, "", "", "", None, df, current_modified_time