Function fileno

Lib/fileinput.py:144–151

Return the file number of the current file. When no file is currently opened, returns -1.

()

    return _state.filelineno()

def fileno():
    """
    Return the file number of the current file. When no file is currently
    opened, returns -1.
    """
    if not _state:
        raise RuntimeError("no active input()")
    return _state.fileno()

def isfirstline():
    """