code: def append_this_package_path(depth=1):
      
      from .caller import caller
  
      logg.debug('caller module %s', caller.modulename(depth + 1))
      c = caller.abspath(depth + 1)
      logg.debug('caller path %s', c)
  
      p = guess_package_path(dirname(c))
      if p:
          logg.debug('appending sys path %s', p)
          append_sys_path(p)
      else:
          # do some logging
          logg.debug('failed to guess package path for: %s', c)
docs: this_package.py 에서 사용
      import snipy.this_package