Solution to "ImportError: cannot import name blocks"

[DazWilkin]

As-is the code is not currently working.

This helped me:
ethereum/pyethapp#241

Revise Dockerfile to:

# build with `docker build -t localethereum/client-python .`
FROM python:2.7.11

RUN pip install pyethapp==1.5.1a0
ENTRYPOINT ["/usr/local/bin/pyethapp"]

Then make setup and the errors outlined below should be replaced with a successful start:

docker-compose up --scale bootstrap=1 --scale miner=2 --scale eth=3
Creating simple_eth_1 ... 
Creating simple_eth_2 ... 
Creating simple_eth_3 ... 
Creating simple_eth_1 ... done
Creating simple_eth_2 ... done
Creating simple_eth_3 ... done
Creating bootstrap ... 
Creating bootstrap ... done
Creating simple_miner_1 ... 
Creating simple_miner_2 ... 
Creating simple_miner_1 ... done
Creating simple_miner_2 ... done

BUT recurrent:

| Traceback (most recent call last):
|   File "/usr/local/bin/pyethapp", line 7, in <module>
|     from pyethapp.app import app
|   File "/usr/local/lib/python2.7/site-packages/pyethapp/app.py", line 19, in <module>
|     from ethereum import blocks
| ImportError: cannot import name blocks
bootstrap exited with code 1

and

docker-compose ps
     Name                   Command               State    Ports
----------------------------------------------------------------
bootstrap        /usr/local/bin/pyethapp -c ...   Exit 1        
debug            /usr/local/bin/pyethapp -c ...   Exit 1        
simple_eth_1     /usr/local/bin/pyethapp -c ...   Exit 1        
simple_eth_2     /usr/local/bin/pyethapp -c ...   Exit 1        
simple_eth_3     /usr/local/bin/pyethapp -c ...   Exit 1        
simple_miner_1   /usr/local/bin/pyethapp -c ...   Exit 1        
simple_miner_2   /usr/local/bin/pyethapp -c ...   Exit 1