from netmiko import ConnectHandler
device = {
'device_type': 'cisco_ios',
'ip': '10.0.0.3',
'username': 'admin',
'password': 'password',
}

commands = [
'copy tftp://10.0.0.100/new_image.bin flash:',
'reload'
]

connection = ConnectHandler(**device)
output = connection.send_config_set(commands)
print(output)