how to kill all excel process before code running by xlwings

You can use the following code to kill all Excel processes before running your code using xlwings:

import psutil

def kill_excel_processes():
    for proc in psutil.process_iter():
        try:
            if proc.name() == "EXCEL.EXE":
                proc.kill()
        except (psutil.NoSuchProcess, psutil.AccessDenied, psutil.ZombieProcess):
            pass

# Call the kill_excel_processes function before running your xlwings code
kill_excel_processes()

This code uses the `psutil` module to iterate through all running processes and kills any process with the name "EXCEL.EXE". Make sure to call the `kill_excel_processes()` function before running your xlwings code to ensure that any existing Excel processes are terminated.