[Python] Python code to detect and verify which serial com port is open

I am trying to write automated code in Python that will first list all available serial com ports on a PC (in Windows 10) and then checks which is active (open).

import serial

active_ports = [port.device for port in serial.tools.list_ports.comports()]
print(active_ports)

# and then put in a for loop to test each
ser = serial.Serial(active_ports, 9600, timeout=1)


But after last line it is just stuck there.

But when I specify the port number I get this:

import serial

ser = serial.Serial("COM5", 9600, timeout=1)


Traceback (most recent call last):
File "<pyshell#7>", line 1, in <module>
ser = serial.Serial("COM5", 9600, timeout=1)
File "C:\Users\ghoura\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\serial\serialwin32.py", line 33, in __init__
super(Serial, self).__init__(*args, **kwargs)
File "C:\Users\ghoura\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\serial\serialutil.py", line 244, in __init__
self.open()
File "C:\Users\ghoura\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\serial\serialwin32.py", line 64, in open
raise SerialException("could not open port {!r}: {!r}".format(self.portstr, ctypes.WinError()))
serial.serialutil.SerialException: could not open port 'COM5': OSError(22, 'The semaphore timeout period has expired.', None, 121)

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