import subprocess
import time # for test

def get_connected_network_interface_name():
	netsh_command = subprocess.Popen(['netsh', 'interface', 'show', 'interface'], stdout=subprocess.PIPE)
	is_interface_name_lines = False
	for netsh_output_line in netsh_command.stdout:
		if netsh_output_line == b'-------------------------------------------------------------------------\r\n':
			is_interface_name_lines = True
			continue
		if is_interface_name_lines:
			interface_info_text = netsh_output_line.decode('utf-8')
			interface_info_struct = interface_info_text.split()
			if interface_info_struct[1] == 'Connected':
				return interface_info_struct[3]
	return ''

def disconnect_network_interface(name):
	netsh_commend = subprocess.Popen(['netsh', 'interface', 'set', 'interface', name, 'disabled'])

def connect_network_interface(name):
	netsh_commend = subprocess.Popen(['netsh', 'interface', 'set', 'interface', name, 'enabled'])

def main():
	interface_name = get_connected_network_interface_name()
	print(interface_name)
	disconnect_network_interface(interface_name)
	time.sleep(10)
	connect_network_interface(interface_name)

if __name__ == '__main__':
	main()