plaid2text.py 文件源码

def __call__(self, string):
        # the special argument "-" means sys.std{in,out}
        if string == '-':
            if 'r' in self._mode:
                return sys.stdin
            elif 'w' in self._mode:
                return sys.stdout
            else:
                msg = 'argument "-" with mode %r' % self._mode
                raise ValueError(msg)

        # all other arguments are used as file names
        try:
            return open(string,
                        self._mode,
                        self._bufsize,
                        self._encoding,
                        self._errors,
                        newline=self._newline)
        except OSError as e:
            message = "can't open '%s': %s"
            raise ArgumentTypeError(message % (string, e))