new_contents: import os
  
  PYMICRO_ROOT_DIR = os.path.abspath(os.curdir)
  PYMICRO_EXAMPLES_DATA_DIR = os.path.join(PYMICRO_ROOT_DIR, 'examples', 'data')
  PYMICRO_XRAY_DATA_DIR = os.path.join(PYMICRO_ROOT_DIR, 'pymicro', 'xray', 'data')
subject: add a new config file at the project root