pocket2quiver.py 文件源码

def prompt_path_if_none(arguments, key, key_desc, force_prompt=False, extension=""):
  value = arguments[key] or jkv.get(key, None)
  if not value or force_prompt:
    confirm = False
    while not confirm:
      confirm = True
      value = prompt(
        message=key_desc+": ", 
        validator=NotEmptyValidator(error=key_desc+' required'), 
        completer=PathCompleter(
          expanduser=True,
          file_filter=has_extension(extension) ))
      value = abspath(expanduser(value))
      root, ext = splitext(value)
      value = root + extension
      print(value)
      if not exists(value):
        confirm = prompt_yn('Create {}? (Y/n): '.format(value))
  jkv[key] = value
  return value