Python with Qt designer Code update for exe creation

Need to update the Python codes as program is running slow along with few updates. Python codes are developed to monitor CANbus data (Drivers available). Data is displayed using Qt Designer graphic. Also start function and record function already setup to record data in spreadsheet. Need following updates...
1. Code running slow sometimes. Software hangs up. -- Need to fix this.
2. At moment, 3 temp. sensors are monitored and recorded -- Need to monitor 3 more.
3. Spreadsheet data needs to be checked if recording correct-- If not, then correct it
4. Need to create standalone executable after codes are running fine.