update to python3

Dockerfile

@@ -5,10 +5,11 @@ FROM debian:9
 # install build tools and dependencies
 
 RUN apt-get update && apt-get install -y \
-    build-essential git python python-ecdsa gcc-arm-none-eabi curl
-RUN apt-get install -y unzip python-pip
+    build-essential curl unzip git python3 python3-pip gcc-arm-none-eabi libnewlib-arm-none-eabi
 
 ENV PROTOBUF_VERSION=3.4.0
 RUN curl -LO "https://github.com/google/protobuf/releases/download/v${PROTOBUF_VERSION}/protoc-${PROTOBUF_VERSION}-linux-x86_64.zip"
 RUN unzip "protoc-${PROTOBUF_VERSION}-linux-x86_64.zip" -d /usr
-RUN pip2 install "protobuf==${PROTOBUF_VERSION}"
+RUN pip3 install "protobuf==${PROTOBUF_VERSION}" ecdsa
+
+RUN ln -s python3 /usr/bin/python

firmware/coins-gen.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python
 from __future__ import print_function
 import json, sys
 

firmware/nem_mosaics.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python
 import json, os, sys
 
 import collections, numbers

firmware/protob/messages_map.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python
 from collections import defaultdict
 from messages_pb2 import MessageType
 from types_pb2 import wire_in, wire_out, wire_debug_in, wire_debug_out, wire_tiny, wire_bootloader