AS

## 1. Run ROS Nodes with Python3

This will need a seperate ros workspace which is built againist python3. In following steps there is instructions on how to create and build workspace against python3

### 1.0 install necessery tools for python3
```bash
sudo apt-get install python3-pip python3-yaml
sudo pip3 install rospkg catkin_pkg
sudo apt-get install python-catkin-tools python3-dev python3-numpy
```
### 1.1 clone ros source code and cv_bridge

```bash
cd ~/catkin_ws 
mkdir -p ws_py3_nn/src 
cd ws_py3_nn/src 
git clone https://github.com/ros/ros.git
git clone -b melodic https://github.com/ros-perception/vision_opencv.git
```

### 1.2 build ROS and cv_bridge againist python3  
```bash
cd ~/catkin_ws/ws_py3_nn
catkin_make_isolated -DPYTHON_EXECUTABLE=/usr/bin/python3 -DPYTHON_INCLUDE_DIR=/usr/include/python3.6m -DPYTHON_LIBRARY=/usr/lib/x86_64-linux-gnu/libpython3.6m.so
```