python - Win32 exception occurred when using pythoncom.CoUninitialize() and wmi -



python - Win32 exception occurred when using pythoncom.CoUninitialize() and wmi -

i trying create create function in python 3.4 ping server. needs work on windows (possibly xp , above).

i have found can utilize wmi win32_pingstatus (reference) class ping server , have written next function:

import sys if sys.platform.startswith('win32'): import wmi import pythoncom def ping(ip_address): """ check if can ping ip address using os ping tool""" if sys.platform.startswith('win32'): try: pythoncom.coinitialize() c = wmi.wmi() status_code = c.win32_pingstatus(address=ip_address)[0].statuscode if status_code == 0: successful = true else: successful = false pythoncom.couninitialize() except wmi.x_wmi: # if wmi ping fails fallback pass else: raise notimplementederror homecoming successful if __name__ == "__main__": ping("127.0.0.1")

this works intended returns true when can ping ip , false when can't. every time run series of errors @ end:

win32 exception occurred releasing iunknown @ 0x03140980 win32 exception occurred releasing iunknown @ 0x031635d0 win32 exception occurred releasing iunknown @ 0x03163560

this happens every time run script although first 2 bytes of address alter each time. lastly 2 bytes remain same.

i have tried commenting out various sections of code , have found if remove pythoncom.couninitialize() exceptions not occur. using pythoncom.coinitialize() , pythoncom.couninitialize() want phone call function in thread described here

i have tried adding print(pythoncom._getinterfacecount()) see how many interfaces nowadays , have noticed each time function run interfaces increment 6 , not cut down not cut down downwards under 10 ever.

does know why exception occurring , right way deal is?

thank you

i think have managed prepare problem. seems should phone call pythoncom.coinitialize() in separate thread pythoncom automatically calls on main thread http://docs.activestate.com/activepython/2.5/pywin32/pythoncom__coinitializeex_meth.html.

so check if current thread main thread , if don't phone call pythoncom.coinitialize() , pythoncom.couninitialize().

python winapi wmi

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