Error when running prompt.py in Docker container

[JorritvandenBerg]

Hi all,

First of all, great work that you are doing for NEO. I noticed this library and wanted to use it myself to test NEO smart contract development in Python. I created a Dockerfile with the following lines:

FROM ubuntu:16.04

RUN apt-get update && apt-get -y install git python-dev python-pip libleveldb-dev

RUN git clone https://github.com/CityOfZion/neo-python.git

WORKDIR neo-python

RUN pip install -r requirements.txt

CMD python prompt.py

However, when running a container build from this Dockerfile, it results in the following error.

Traceback (most recent call last):
File "prompt.py", line 15, in
from neo.Network.NodeLeader import NodeLeader
File "/neo-python/neo/Network/NodeLeader.py", line 2, in
from neo.Core.Block import Block
File "/neo-python/neo/Core/Block.py", line 6, in
from neo.Core.TX.Transaction import Transaction,TransactionType
File "/neo-python/neo/Core/TX/Transaction.py", line 10, in
from neo.Core.TX.TransactionAttribute import *
File "/neo-python/neo/Core/TX/TransactionAttribute.py", line 16, in
class TransactionAttributeUsage(object):
File "/neo-python/neo/Core/TX/TransactionAttribute.py", line 17, in TransactionAttributeUsage
ContractHash = int.from_bytes(b'\x00','little')
AttributeError: type object 'int' has no attribute 'from_bytes'

Did I miss something or maybe need to use a Python version other than 2.7? Or am I being too curious and is it not ready yet?

Thanks again and if you need any help with development please let me know.

[localhuman]

Thanks! Python 3 is required, has been tested on 3.5 the future is open {

…

On Aug 22, 2017, at 12:09 PM, Jorrit van den Berg ***@***.***> wrote: Hi all, First of all, great work that you are doing for NEO. I noticed this library and wanted to use it myself to test NEO smart contract development in Python. I created a Dockerfile with the following lines: FROM ubuntu:16.04 RUN apt-get update && apt-get -y install git python-dev python-pip libleveldb-dev RUN git clone https://github.com/CityOfZion/neo-python.git WORKDIR neo-python RUN pip install -r requirements.txt CMD python prompt.py However, when running a container build from this Dockerfile, it results in the following error. Traceback (most recent call last): File "prompt.py", line 15, in from neo.Network.NodeLeader import NodeLeader File "/neo-python/neo/Network/NodeLeader.py", line 2, in from neo.Core.Block import Block File "/neo-python/neo/Core/Block.py", line 6, in from neo.Core.TX.Transaction import Transaction,TransactionType File "/neo-python/neo/Core/TX/Transaction.py", line 10, in from neo.Core.TX.TransactionAttribute import * File "/neo-python/neo/Core/TX/TransactionAttribute.py", line 16, in class TransactionAttributeUsage(object): File "/neo-python/neo/Core/TX/TransactionAttribute.py", line 17, in TransactionAttributeUsage ContractHash = int.from_bytes(b'\x00','little') AttributeError: type object 'int' has no attribute 'from_bytes' Did I miss something or maybe need to use a Python version other than 2.7? Or am I being too curious and is it not ready yet? Thanks again and if you need any help with development please let me know. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub, or mute the thread.

[JorritvandenBerg]

Thanks for your prompt response. I have updated the Dockerfile and it works now. Also included the file in a merge request, may it be of use for others.