ROS Python3.5 Set Up

ros_py35_setup.bash

#!/usr/bin/env bash

# Create isolated ROS Workspace
cd ~
mkdir ros_py35
cd ros_py35

# Unset sourced workspace
# Go to ~/.bashrc and comment out lines from previous installation of ROS (Lunar)

# Get python3 helper libraries
sudo pip3 install rosdep 
sudo pip3 install rosinstall_generator
#sudo pip3 install wstool 
sudo pip3 install rosinstall

# Configure your catkin workspace
catkin config --init
catkin config -DCMAKE_BUILD_TYPE=Release

git clone https://github.com/tkruse/vcstools
cd vcstools
git checkout mock_server_tar_test
python setup.py develop
cd ..
git clone https://github.com/vcstools/wstool
cd wstool
python setup.py develop
wstool --help

# Pull bare-bone dependencies for ROS (Melodic) and use workspace tool to initialize
rosinstall_generator ros_comm --rosdistro melodic --deps --tar > melodic-ros_comm.rosinstall
wstool init -j8 src melodic-ros_comm.rosinstall

# If any installations failed, fix and continue using:
wstool update -j 4 -t src

# Set python version before catkin build
export ROS_PYTHON_VERSION=3

# Install some other dependencies
sudo apt install python3-empy
sudo apt install libgpgme11-dev

catkin build

# Note:
# You will probably see two build errors because of inappropriately set compile flags. They will try to compile without C++11 and fail.
# You can manually go to these CMakeLists.txt files and add "std=c++11" to the compile options and build again.
# Candidate trouble makers : src/ros_comm/rosbag & src/ros_comm/rosbag_storage

# Add other necessary ROS-Packages using rosinstall_generator
rosinstall_generator ros_comm sensor_msgs nav_msgs geometry_msgs --rosdistro melodic --deps --tar > melodic-ros_comm.rosinstall
wstool merge -t src melodic-ros_comm.rosinstall
wstool update -t src/

Is this the totality of your configuration to run ROS with python 3.5? I've been trying to implement a similar configuration, but I've needed to install a significant number of additional libraries, and ROS still seems to be trying to use python2.7.

Edit: I'm trying to work with ROS Kinetic, which may be part of the issue.

Here are instructions for a full build of desktop-full with python3.6: https://www.miguelalonsojr.com/blog/robotics/ros/python3/2019/08/20/ros-melodic-python-3-build.html