Method fileno

tools/python-3.11.9-amd64/Lib/fileinput.py:383–390

(self)

        return self._filelineno

    def fileno(self):
        if self._file:
            try:
                return self._file.fileno()
            except ValueError:
                return -1
        else:
            return -1

    def isfirstline(self):
        return self._filelineno == 1