provider = NetconfServiceProvider(address="10.0.0.1",
                                      port=830,
                                      username="admin",
                                      password="admin",
                                      protocol="ssh")

provider = NetconfServiceProvider(address="ec2-xx-xx-xx-xx.us-west-2.compute.amazonaws.com",
username= "ec2-user",
 public_key_path="mykey.pem")

Traceback (most recent call last):
  File "hello-ydk.py", line 18, in <module>
    private_key_path="mykey.pem")
TypeError: __init__(): incompatible constructor arguments. The following argument types are supported:
    1. ydk_.providers.NetconfServiceProvider(repo: ydk_.path.Repository, address: unicode, username: unicode, password: unicode, port: int=830L, protocol: unicode=u'ssh', on_demand: bool=True, timeout: int=-1L)
    2. ydk_.providers.NetconfServiceProvider(address: unicode, username: unicode, password: unicode, port: int=830L, protocol: unicode=u'ssh', on_demand: bool=True, common_cache: bool=False, timeout: int=-1L)
    3. ydk_.providers.NetconfServiceProvider(repo: ydk_.path.Repository, address: unicode, username: unicode, private_key_path: unicode, public_key_path: unicode, port: int=830L, on_demand: bool=True, timeout: int=-1L)
    4. ydk_.providers.NetconfServiceProvider(address: unicode, username: unicode, private_key_path: unicode, public_key_path: unicode, port: int=830L, on_demand: bool=True, common_cache: bool=False, timeout: int=-1L)

Invoked with: 'ec2-xx-xx-xx-xx.us-west-2.compute.amazonaws.com', 'ec2-user'; kwargs: repo=None, public_key_path='mykey.pem'

from: can't read /var/mail/ydk.services
from: can't read /var/mail/ydk.providers
from: can't read /var/mail/ydk.models.cisco_ios_xr
from: can't read /var/mail/datetime
./hello-ydk.py: 13: ./hello-ydk.py: Syntax error: "(" unexpected (expecting "then")