Artificial Intelligence Practice¶

Downloading Practical Material¶

To update the practical material, issue the following commands:

cd ~/ros2_ws/src/arj_packages

git checkout -- .

git pull

Installing Conda Environment¶

Anaconda (miniconda) provides an isolated virtual environment where we can install the required version of Python packages for the current work.

mkdir -p ~/miniconda3

wget https://repo.anaconda.com/miniconda/Miniconda3-latest-Linux-x86_64.sh -O ~/miniconda3/miniconda.sh

bash ~/miniconda3/miniconda.sh -b -u -p ~/miniconda3

rm -rf ~/miniconda3/miniconda.sh

~/miniconda3/bin/conda init bash

The solver coordinates the versions among the packages required for the predefined environment (environment.yml). The libmamba-solver allows for faster coordination compared to the default solver.

source ~/.bashrc

conda config --set auto_activate_base false

conda update -n base conda

conda install -n base conda-libmamba-solver

conda config --set solver libmamba

Once Conda is installed, we create our own virtual environment:

cd ~/ros2_ws/src/arj_packages/arj_ai

conda env create -f environment.yml

Opening the Practice¶

The material can be opened as follows:

conda activate practice

cd ~/ros2_ws/src/arj_packages/arj_ai

code .

Select the environment:

Troubleshooting¶

TODO

ImportError                               Traceback (most recent call last)
Cell In[1], line 10
    8 import matplotlib.patches as patches
    9 import matplotlib.pyplot as plt
---> 10 import torch
     11 import torchvision.transforms as transforms
     12 from PIL import Image

File ~/miniconda3/envs/practice/lib/python3.8/site-packages/torch/__init__.py:189
    187     if USE_GLOBAL_DEPS:
    188         _load_global_deps()
--> 189     from torch._C import *
    191 # Appease the type checker; ordinarily this binding is inserted by the
    192 # torch._C module initialization code in C
    193 if False:

ImportError: /home/he/miniconda3/envs/practice/lib/python3.8/site-packages/torch/lib/libtorch_cpu.so: undefined symbol: iJIT_IsProfilingActive

Deactivating Conda¶

conda deactivate