Script to check if the given directory is a python project or not. (Assumes it to be a python project if there exists `requirements.txt` or `pyproject.toml` or any file ending with `.py`

is_python_project.sh

is_python_project() {
  local dir=$1
  local filename
  filename=$(basename "$dir")

  # assumes a directory is a python project, if it has files which are usually found in python project root directory like
  # requirements.txt, pyproject.toml and setup.py
  if [[ -f "$dir"/requirements.txt || -f "$dir"/pyproject.toml || -f "$dir"/setup.py || "$filename" == *.py ]]; then
    echo "${dir} is a python project"
    return 0
  else
    available_dirs=$(ls "$dir")
    if [[ -n "$available_dirs" ]]; then
      for file in "$dir"/*; do
        if [[ -d "$file" ]]; then
          is_python_project "$file"
        fi
      done
    fi
  fi
  return 1
}