code: def check_sas_base_dir(root=None):
      ''' Check for the SAS_BASE_DIR environment variable
  
      Will set the SAS_BASE_DIR in your local environment
      or prompt you to define one if is undefined
  
      Parameters:
          root (str):
              Optional override of the SAS_BASE_DIR envvar
  
      '''
      sasbasedir = root or os.getenv("SAS_BASE_DIR")
      if not sasbasedir:
          sasbasedir = input('Enter a path for SAS_BASE_DIR: ')
      os.environ['SAS_BASE_DIR'] = sasbasedif check_sas_base_dir(root=None):
      ''' Check for the SAS_BASE_DIR environment variable
  
      Will set the SAS_BASE_DIR in your local environment
      or prompt you to define one if is undefined
  
      Parameters:
          root (str):
              Optional override of the SAS_BASE_DIR envvar
  
      '''
      sasbasedir = root or os.getenv("SAS_BASE_DIR")
      if not sasbasedir:
          sasbasedir = input('Enter a path for SAS_BASE_DIR: ')
      os.environ['SAS_BASE_DIR'] = sasbasedir
docs: Check for the SAS_BASE_DIR environment variable
  
      Will set the SAS_BASE_DIR in your local environment
      or prompt you to define one if is undefined
  
      Parameters:
          root (str):
              Optional override of the SAS_BASE_DIR envvar