Pyshark cannot capture package on windows 7 (python)

Question

I want to capture a package using pyshark. but I could not grab the package on windows 7.

this is my python code

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import pyshark def NetCap(): print 'capturing...' livecapture = pyshark.LiveCapture(interface="eth0", output_file='./test.pcapng') livecapture.sniff(packet_count=10) print 'end of capture.' print livecapture if __name__ == "__main__": NetCap() 

This is the result.

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 capturing... end of capture. <LiveCapture (0 packets)> 

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Livecapture - 0 packages. I do not know what the matter is. please help me.