code: def validate_project(project_name):
      
      if '-' in project_name:
          return None
      if keyword.iskeyword(project_name):
          return None
      if project_name in dir(__builtins__):
          return None
      try:
          __import__(project_name)
          return None
      except ImportError:
          return project_name
docs: Check the defined project name against keywords, builtins and existing
      modules to avoid name clashing