I'm wondering about the line:

    steem = Steem()

When I look at the github source it's defined on line 13 yet it is never used.

Can that line just be removed?

Also I'm trying to figure out the node error issue. I was able to solve in on another one of your tutorial by passing my keys into the Steem object:

    steem = Steem(nodes,keys)

I'm doing the same with this example but I still get an error about the nodes:
````
WARNING:urllib3.connectionpool:Retrying (Retry(total=17, connect=None, read=None, redirect=0, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f4483e929b0>: Failed to establish a new connection: [Errno -5] No address associated with hostname',)': /
WARNING:urllib3.connectionpool:Retrying (Retry(total=16, connect=None, read=None, redirect=0, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f4483e92ac8>: Failed to establish a new connection: [Errno -5] No address associated with hostname',)': /
WARNING:urllib3.connectionpool:Retrying (Retry(total=15, connect=None, read=None, redirect=0, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f4483e92ba8>: Failed to establish a new connection: [Errno -5] No address associated with hostname',)': /
WARNING:urllib3.connectionpool:Retrying (Retry(total=14, connect=None, read=None, redirect=0, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f4483e92cf8>: Failed to establish a new connection: [Errno -5] No address associated with hostname',)': /
````
Do I have to pass the nodes array into the `blockchain` object too?